Stroke – ABC CARDIOL

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ORIGINAL ARTICLE

Prognostic Value of QTc Interval and Other Ventricular Repolarization Parameters in Acute Stroke

Catarine Benta Lopes dos Santos et al. Sérgio Ferreira de Ferreira Filho Marcelo Angst Anderson Donelli da Silveira … Sheila Cristina Ouriques Martins Mauricio Pimentel

Abstract

Background:

The electrocardiogram (ECG) is routinely used in stroke evaluation, although interactions within the brain–heart axis remain incompletely understood. The prognostic relevance of the QTc interval and other ventricular repolarization markers has gained increasing interest in stroke populations.

Objectives:

To evaluate the association of QTc interval, QTc dispersion (QTc-d), Tpeak–end interval (Tp-e), and Tp-e/QTc ratio with neurological disability and in-hospital mortality in acute stroke.

Methods:

This retrospective cohort included patients admitted with acute stroke between January 2018 and April 2020. QTc was analyzed as both a continuous and categorical variable, using a cutoff of 480 ms. Functional disability was assessed using the modified Rankin Scale (mRS) and categorized as no disability (mRS ≤ 2) or disability (mRS > 2). Sample size calculation indicated a minimum of 482 patients (85% power; 5% significance), based on functional outcome differences between prolonged and normal QTc. A 5% significance level was used for all analyses.

Results:

A total of 565 patients were included (50.1% male; mean age 65 ± 13 years). Of these, 280 (49.6%) had mRS > 2, and 69 (12.5%) died during hospitalization. Higher QTc values were associated with worse neurological outcomes in univariable (HR 1.01; 95% CI, 1.00–1.01; p 480 ms was also associated with disability in univariable (HR 2.43) and multivariable models (HR 2.67). QTc was not associated with in-hospital mortality.

Conclusion:

QTc prolongation, particularly QTc > 480 ms, was independently associated with unfavorable neurological outcomes.

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Original Article

Percutaneous Patent Foramen Ovale Occlusion in Patients Over 60 Years of Age with History of Stroke

Marcelo Sabedotti et al. Luciano da Silva Selistre Agda Mezzomo Fabio Eduardo Camazzola … Ramiro Caldas Degrazia Bibiana Guimarães Maggi Sara Voltolini

Abstract

Background:

The prevalence of patent foramen ovale (PFO) is 27%. PFO is related to paradoxical embolism, which can cause ischemic stroke. Ischemic stroke without an identifiable cause is common, accounting for up to 40% of cases, and PFO is frequently found in these patients. The prevalence of PFO is almost 3 times higher in elderly patients with ischemic stroke without identified etiology, suggesting that these patients may also benefit from PFO closure.

Objectives:

The primary objective was to assess the recurrence of ischemic stroke or transient ischemic attack during clinical follow-up. The secondary objective was to assess the occurrence of procedural complications, onset of atrial fibrillation, and reduced anticoagulant use.

Methods:

This retrospective cohort study included 36 patients over 60 years of age with prior ischemic stroke who underwent PFO closure. Survival analysis was performed using the Kaplan-Meier model. Independence tests between categorical variables were performed using the chi-square test and Fisher’s exact test, adopting a significance level of 0.05.

Results:

The patients’ mean age was 69.6 ± 6.5 years, and 55.5% were men. No complications occurred during the procedures. Echocardiography was performed 30 days after the intervention, showing no residual shunts. During the follow-up of 58.9 ± 42.7 months, there were no cases of ischemic stroke, transient ischemic attack, or atrial fibrillation related to the procedure. The use of anticoagulants decreased from 41.7% to 5.6% (p = 0.03).

Conclusions:

Percutaneous PFO occlusion for the prevention of cerebrovascular events in individuals over 60 years of age with prior ischemic stroke is effective and safe, with a low risk of complications, and it can reduce the risk of bleeding by reducing the use of anticoagulants.

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Original Article

Epidemiological Profile and Comparison of Mortality Due to Stroke and Atrial Fibrillation in Brazil Over the Past 26 Years

Leticia Da Costa Santana Silva et al. Luana Yasmim Fernández Avelaneda Castanheira Maria Dalila Santos Salim Ohara Rumayane Paiva Santos Rebouças Ruy Felipe Melo Viegas

Abstract

Background:

Atrial fibrillation (AF) stands out as the most prevalent arrhythmia, and its incidence increases with age. Stroke ranks as the second leading cause of mortality in Brazil and represents the primary contributor to global disability.

Objective:

Considering the severity of these conditions, this study seeks to elucidate the epidemiological landscape of AF and stroke-related deaths in Brazil from 1996 to 2022.

Methods:

The following variable were analyzed in the study – geographic region, federative state, age demographics, gender distribution, year of mortality, race/ethnicity, educational attainment, and place of death. This research adopted a descriptive approach through a retrospective, exploratory, epidemiological analysis of data sourced from the Mortality Information System (SIM) accessible through the Department of Health Informatics of the Brazilian Unified Health System (DATASUS) website.

Results:

Over the 26-year period, 1,201,327 deaths from AF and stroke were registered in Brazil. These deaths were mostly caused by stroke (94.5%) and were more concentrated in the southeast region, where the highest number of doctors capable of identifying and notifying these deaths are also concentrated.

Conclusion:

This study claims for a paradigm shift in disease control strategies and underscores the imperative of bolstering the efficacy of public health policies to address the huge impact of stroke and AF-related mortality on population health.

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Original Article

Ischemic Stroke and Acute Myocardial Infarction: Trends in in-Hospital Mortality in Brazil from 1998 to 2018

Júlio Martinez Santos et al. Alessandra Barboza Resende Martinez Emerson de Jesus Silva Gustavo Roberto Santana … Romero Henrique de Almeida Barbosa David Fernandes Lima Matheus Rodrigues Lopes Johnnatas Mikael Lopes

Abstract

Background

Ischemic stroke and acute myocardial infarction (AMI) are cardiovascular diseases with high morbidity and mortality rates in Brazil and worldwide. Their outcomes are influenced by public policies aimed at mitigating risk factors and by investments in infrastructure of emergency support and quality of hospital care.

Objective

To analyze the trend in the proportion of in-hospital deaths from ischemic stroke and AMI in Brazil as a way of evaluating the effectiveness of urgency and emergency services.

Methods

Ecological time series study using data from the Hospital Information System. The outcome was the proportion of in-hospital deaths from ischemic stroke and AMI with stratification by sex and state. Prais-Winsten regression was used to analyze the trend between 1998-2018 with α≤0,05.

Results

The proportion of deaths from AMI and ischemic stroke declined in the time series (p<0.001), decreasing annually by 0.17% and 0.25%, respectively. In 20 years, it reduced 43.76% (ischemic stroke) and 32.39% (AMI) in both sexes. However, the decline was more evident in the South and Southeast regions.

Conclusion

The reduction in hospital deaths from AMI and ischemic stroke was heterogeneous among Brazilian regions, which may be related to inequality in emergency services and hospital support.

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Original Article

Stroke Is Associated with Refractory Hypertension among Resistant and Refractory Patients in a Cross-Sectional Study

Guilherme de Andrade Costa et al. Jamary Oliveira Filho Luana Ferreira-Campos Alex Cleber Improta-Caria … Cristiano Macedo Marcelo Vincenzo Sarno Filho Leonardo Silva Roever Borges Roque Aras Júnior

Abstract

Background

Refractory hypertension (RfH) is a severe phenotype of resistant hypertension (RH) linked to higher risk of stroke and other adverse cardiovascular events, but knowledge about it is still lacking.

Objectives

To evaluate the association between RfH and stroke.

Methods

We conducted a cross-sectional study in a referral clinic for patients with severe hypertension in the period from 2018 to 2020. RH was defined as uncontrolled blood pressure (BP) despite the use of 3 antihypertensive agents, including a diuretic, or the use of ≥ 4 agents regardless of BP control. RfH was defined as lack of BP control despite use of ≥ 5 antihypertensive agents. Individuals were classified as RfH or RH, and multivariate logistic regression models were constructed to examine the association between RfH and stroke.

Results

We evaluated a total of 137 patients; 81% were female, and 93,3% were Black or multiracial. The mean age was 64.4 years. Stroke was more prevalent in the RfH group (35.7%), in comparison to the RH group (12.8%) (p value = 0.01). Unadjusted odds ratio (OR) and 95% confidence interval (CI) for factors associated with stroke were RfH (OR 3.77; 95% CI 1.45 to 9.80), systolic BP (OR 1.02; 95% CI 1.002 to 1.04) and diastolic BP (OR 1.03; 95% CI 1.001 to 1.06). Adjusted OR for factors associated with stroke were RfH (OR 3.55; 95% CI 1.02 to 12.42), systolic BP (OR 1.02; 95% CI 0.99 to 1.05) and diastolic BP (OR 1.01; 95% CI 0.96 to 1.06).

Conclusion

RfH was associated with higher prevalence of stroke. Efforts are required to better understand this association to prevent adverse cardiovascular outcomes in these patients.

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Editorial

Analyzing the Impact of Stroke in the Southeast Region of Brazil

Gabriel Porto Soares et al. Thais Rocha Salim

Stroke is among the main causes of death in the world, a fact that is no different in Brazil. It is grouped in diseases of the circulatory system that correspond to almost 30% of deaths in Brazil; in this group of diseases, ischemic heart diseases hold first place, immediately followed by cerebrovascular diseases.

It is impossible not to mention the fact that stroke, when it does not lead to death, generates disabilities and different degrees of deficiency, maintaining survival, but generating a great reduction in quality of life, in addition to inability to work and reduced autonomy with limitations in carrying out daily tasks.

[…]

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Original Article

The Burden of Stroke in the Southeast Region of Brazil in 2019: an Estimate Based on Secondary Data from the Brazilian United Health System

Marcio Fernandes dos Reis et al. Alfredo Chaoubah

Abstract

Background:

Stroke is one of the main causes of morbidity and mortality in the Southeast Region of Brazil, and it is impacted by socioeconomic conditions and the age of the population in the region.

Objectives:

The objective of this study was to estimate the burden of stroke in the adult population, for both sexes, in different age groups, in the Southeast Region of Brazil, in the year 2019.

Methods:

This descriptive study was conducted with secondary data on stroke, obtained from the Department of Informatics of the Brazilian Unified Health System (DATASUS) and the Brazilian Institute of Geography and Statistics (IBGE), to calculate years of life lost (YLL), years lived with disability (YLD), and disability-adjusted life years (DALY).

Results:

In the year 2019, in the Southeast Region of Brazil, a total of 713,132 DALY were estimated, 80% from YLD and 20% from YLL. The highest values were from the state of São Paulo, as it is the most populous state; in the female sex, due to the greater number of female inhabitants; and in the age group between 40 and 59 years. However, when adjusted to a rate of 100,000 inhabitants, the greatest impact was for the male sex in the state of Minas Gerais, mainly in the age group between 70 and 79 years.

Conclusions:

YLD were more relevant in the composition of DALY, due to higher stroke morbidity than mortality, and high stroke DALY burdens impact the economically active population in this region.

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Editorial

The Influence of Primary Atherosclerotic Diseases on the Occurrence of Secondary Disease

Marcelo Chiara Bertolami

Atherosclerosis is a chronic inflammatory process in which the accumulation of cholesterol-laden plaque restricts blood flowin the arterial vasculature. The occlusion of arteries by expanding plaque or emboli from plaque rupture or erosion underlies a variety of cardiovascular diseases including myocardial infarction, ischemic cardiomyopathy, stroke, and peripheral vascular disease. Although cardiovascular disease remains a leading cause of morbidity and mortality in high-income countries, an epidemiological shift has occurred in recent decades.^, Improvements in vaccination and treatment of infectious diseases have led to a notable increase in the prevalence of cardiovascular diseases in low- and middle-income nations.

The prominent and increasing burden of atherosclerotic cardiovascular disease has stimulated growing interest in the elucidation of its pathogenesis, risk factors, prevention, and treatments. There has been remarkable progress in the understanding of atherosclerosis pathophysiology, and new risk factors, in addition to traditional ones, have been described to be implicated, including disturbed sleep, physical inactivity, the microbiome, the microbiota and gender-related factors. Also, knowledge about the importance and possibility of its early prevention, preferably during childhood or even earlier in pregnancy, and about optimized treatment by non-pharmacological therapies, pharmacotherapy, and/or interventional procedures, has expanded, tremendously; but even so, atherosclerotic cardiovascular disease remains the number one killer in the world.

[…]

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Editorial

Atrial Fibrillation and Hemodialysis – Should we Anticoagulate These Patients? Ischemic Versus Hemorrhagic Risk

Iara Atié Malan

Atrial fibrillation (AF) is the most common sustained arrhythmia worldwide, and it is a very frequent cause of increased morbidity and mortality in adults. This arrhythmia favors the formation of thrombi, which can lead to systemic embolism, such as ischemic stroke.

To identify patients with thromboembolic risk, the most used score is the CHA2DS2VASC, which takes the following factors in consideration: heart failure, arterial hypertension, age, diabetes, previous stroke, vascular disease, and sex. It is worth emphasizing that this score does not take renal function or dialysis treatment into consideration.

[…]

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Case Report

Cardiocerebral Infarction: A Combination to Prevent

Margarida Cabral et al. Ana Ponciano Beatriz Santos João Morais

Background

The acute complications of myocardial infarction (MI), such as mechanical, arrhythmic, ischemic, and inflammatory sequelae, may be responsible for significant cardiovascular morbimortality.

Life-threatening arrhythmias, namely ventricular fibrillation or tachycardia, may be a challenging complication requiring a prompt approach. In some cases, acute ischemia leads to polymorphic ventricular tachycardia (PVT), and, rarely, to potentially lethal torsades de pointes ventricular tachycardia.^–

[…]

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Editorial

Neuropeptides Y and Other Promising Biomarkers in Acute Coronary Syndrome

Fernanda A. Andrade et al. Leonardo Carvalho Pedro Gabriel Melo de Barros Silva

Neuropeptide Y (NPY) is a very common neurotransmitter with 36 amino acids that acts as a stimulator of angiogenesis, inflammation and adipogenesis through the NPY2 receptor. The description of high plasma concentrations of NPY in acute coronary syndrome (ACS) and left ventricular dysfunction and its close relationship with the sympathetic nervous system reinforces the possibility of a new prognostic biomarker for risk stratification.^,

In recent years, changes in the NPY signalling pathway have been related to ACS. For example, the NPYc.20T>C mutation is associated with increased serum lipid levels and consequent increase in the risk of ACS, stroke, hypertension, and obesity.^, The NPYc.-485T>C variant has been linked to the development of early atherosclerosis and stroke, and possibly to insulin resistance reduction and development of type 2 diabetes mellitus.^–

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Editorial

Public Health Programs and Cardiovascular Diseases

Paolo Blanco Villela et al. Larissa Franco de Andrade

For decades, cardiovascular diseases, mainly coronary artery disease and stroke, have been the main cause of death in Brazil. In 2017, they accounted for 27.3% of all deaths in the country, with an age-standardized mortality rate of 178 per 100,000 inhabitants. In the same year, cerebrovascular diseases had an age-standardized mortality rate of 80 per 100,000 inhabitants. With respect to the burden of cardiovascular diseases, the number are even more concerning, with 1,602.4 disability-adjusted life years (DALYs) per 100,000 inhabitants for coronary disease and 1,145.3 DALYs per 100,000 inhabitants for stroke.

Although these numbers represent a decrease when compared with numbers in the year of 1990, the control of cardiovascular risk factors is clearly important. In this regard, in addition to the traditional risk factors, socioeconomical factors are known to play an important role in the development of these diseases. Investigators of the Prospective Urban Rural Epidemiologic (PURE) study evaluated socioeconomic status and educational attainment in adults aged between 35 and 70 years from 367 urban and 302 rural communities in 20 countries (five low-income countries, 11 middle-income and five low-income countries), with a total of 164,169 participants. The authors concluded that people with a lower level of education had higher mortality rates from cardiovascular events in all the countries. However, the authors discuss that these findings may be explained not only by the higher prevalence of risk factors, but also by the lower access to secondary prevention and medical management of chronic diseases such as hypertension and diabetes mellitus compared with people with higher level of education. This is in line with the study by Schultz et al., who demonstrated that even in high-income countries, factors like employment status, educational attainment, income level, and neighborhood socioeconomic factors are related to cardiovascular diseases. Thus, the authors consider the access to health services as part of a high-quality health care of low socioeconomic status populations. Therefore, it is possible to infer that, compared with absolute income, inequality levels are more stronger determinants of cardiovascular outcomes.

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Original Article

Stroke and Myocardial Infarction: Effects of the “Hiperdia” and “Mais Médicos” Programs on the Hospitalizations Trends in Brazil

Júlio Martinez Santos et al. Alessandra Barboza Resende Martinez Emerson de Jesus Silva Gustavo Roberto Santana Souza Johnnatas Mikael Lopes

Abstract

Background

Stroke and acute myocardial infarction (AMI) are cardiovascular diseases commonly characterized by the development of atheromatous plaques associated with major complications and high mortality rates.

Objective

To identify an epidemiological trend in hospitalizations due to stroke and AMI and to analyze the relationship between health programs applied in Primary Health Care, gender and the Federative Unit.

Methods

Ecological study with a time series design between 1998 and 2018, collecting data from all federal units in Brazil stratified by, gender and place of residence. There were analyzed Hospitalization Authorizations (AIH) for stroke and MI, consulting the Hospital Admissions System (SIH) of the Informatics Department of the National Health Service with p <0.05.

Results

From 1998 to 2018, the rate of hospitalization for AMI increased in Brazil approximately 42.58 events per 100 thousand inhabitants annually (p<0.001), while hospitalizations for stroke declined 32.17 cases (p=0.03). This pattern was observed in both sexes in AMI and stroke. There is also evidence of the effect of the Hiperdia (p<0.001) and Mais Médicos (p=0.001) program in reducing stroke and Hiperdia cases in mitigating the evolution of AMI cases (p = 0.0001).

Conclusion

Although these diseases remain as an important cause of death, stroke hospitalization has reduced significantly in the period evaluated. National programs as the Hiperdia and Mais Médicos showed an impact in the acute cases of strokes and AMI.

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Original Article

Embolic Stroke of Undetermined Source (ESUS) and Stroke in Atrial Fibrillation Patients: not so Different after all?

Valeria Cristina Scavasine et al. Gustavo da Cunha Ribas Rebeca Teixeira Costa Guilherme Henrique Weiler Ceccato … Viviane de Hiroki Flumignan Zétola Marcos Christiano Lange

Abstract

Background:

Stroke related to atrial fibrillation (AF) is associated with high recurrence and mortality rates. Embolic Stroke of Undetermined Source (ESUS) is associated with fewer vascular risk factors, less disability, and a high recurrence rate.

Objective:

To compare risk factors, functional outcomes and the occurrence of primary endpoint (a composite of recurrent stroke, cardiovascular death, and myocardial infarction) between AF stroke and ESUS patients.

Method:

A retrospective analysis was conducted including all consecutive patients with first-ever ischemic stroke admitted to the Hospital de Clinicas (Clinical Hospital) of the Federal University of Paraná from October 2012 to January 2017 (n=554). There were 61 patients with stroke due to AF and 43 due to ESUS. Both groups were compared for demographic characteristics and vascular risk factors. Logistic regression models were performed to assess the impact of each variable on the primary endpoint in a 12-month follow-up. Statistical significance was considered for p-values < 0.05.

Results:

ESUS patients, as compared to AF patients, were younger and more likely to be smokers. ESUS patients presented a mean CHADS2VASc score of 4, while the AF group presented a score of 5 (p <0.001). The primary endpoint was observed in 9 (20.9%) ESUS and 11 (18.0%) AF patients over a 12-month period (p=0.802). Higher glucose levels upon hospital admission (p=0.020) and a higher modified Rankin Scale upon hospital discharge (p=0.020) were predictors of the primary endpoint occurrence.

Conclusion:

AF and ESUS stroke patients presented very similar independence rates upon hospital discharge and outcomes after 12 months, despite some baseline differences, including stroke recurrence, vascular death, and myocardial infarction.

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Editorial

Rivaroxaban: is it Really Need to Monitor its Anticoagulant Effect in Clinical Practice?

Luiz Eduardo Montenegro Camanho et al. Gustavo Vignoli dos Santos

Oral anticoagulation (OAC) has been the cornerstone for the treatment of atrial fibrillation (AF) patients. The vitamin K antagonist warfarin has been considered the drug of choice in stroke prevention with proven efficacy for more than 60 years. The great inter-patient and intra-patient dose variability and need for routine International Normalized Ratio (INR), are among the main disadvantages of warfarin. The direct-acting oral anticoagulants (DOACs), including direct thrombin inhibitors (dabigatran) and factors Xa inhibitors (apixaban, edoxaban, and rivaroxaban), are currently the therapy of choice for preventing thromboembolic events in patients with atrial fibrillation. Unlike warfarin and other vitamin K antagonists, the DOACs are administered in fixed doses and do not require routine laboratory monitoring.

Rivaroxaban is an oral inhibitor of free and clot-associated factor Xa through reversible, competitive interactions with its active site. Bioavailability following oral administration is dose-dependent, and it is highly bound to plasma proteins. Plasma levels peak 2 to 4 h following oral administration, partially excreted by the kidneys, and has a half-life depending on the dose and age. Factor Xa inhibitors variably affect prothrombin time (PT), with concentration-dependent PT prolongation. The sensitivity of the different assays varies widely, depending on the thromboplastin reagent, and it is recommended to check the sensitivity of PT in each institution. At therapeutic doses, rivaroxaban has a relatively weak effect on PT, but there is a more pronounced effect on supratherapeutic doses.

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Original Article

Pre-hospital Care for Suspected Stroke Patients, Cared for by Mobile Emergency Care Units in Northern Minas Gerais

Lorenn Lages Gusmão et al. Israel Junior Borges do Nascimento Gabriel Almeida Silqueira Rocha João Antonio de Queiroz Oliveira … Geisiane Sousa Braga Machado Izabella de Oliveira Antunes Romeu Vale Sant’anna Breno Franco Silveira Fernandes Ubiratam Lopes Correia Antonio Luiz Pinho Ribeiro Milena S. Marcolino

Abstract

Background

Stroke management require rapid identification, assessment, and transport of patients to qualified health care centers. However, there is little description in the literature on the multiple challenges associated with the pre-hospital transport of suspected stroke patients.

Objective

To characterize the pre-hospital care provided to suspected stroke patients by the Brazilian Emergency Medical Service (SAMU in Portuguese), by means of a descriptive case study.

Methods

This is a descriptive study of a series of cases. Data from the SAMU regarding the responses to emergency calls from suspected stroke patients were collected. Independent reviewers confirmed the diagnostic hypothesis and all discordances were assessed using kappa statistics. Clinical data and transport times were described as frequency and proportion or central tendency and dispersion measures. Normality of continuous variable distribution was assessed using the Kolmogorov-Smirnov test. The Mann-Whitney U test was used for comparison of medians, with a 5% significance level.

Results

During the studied period, 556 suspected stroke patients were treated. The kappa index was 0.82 (95% CI 0.737 to 0.919) CI. In 74.7% of the cases, the symptom onset time was not recorded. The median time elapsed between the call for emergency services and the ambulance arrival was 18 minutes, and the median transport time was 38 minutes. A total of 34% of the patients were taken to referral hospitals for stroke.

Conclusion

This study revealed a low level of knowledge regarding the need to determine the exact time of symptom onset of suspected stroke patients. Also, the study showed the low rate of patients taken to referral hospitals. (Int J Cardiovasc Sci. 2021; [online].ahead print, PP.0-0)

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Original Article

Atrial Fibrillation and Use of Rivaroxaban: Performance of the Prothrombin Time / INR as a Function of Time After Blood Collection

Rita Carolina Figueiredo Duarte et al. Priscila Samara Sérgio Moreira Cláudia Natália Ferreira Estevão Lanna Figueiredo … Eduardo Sternick Francisco Rezende Silveira Luan Carlos Vieira Alves Ana Paula Lucas Mota Edna Afonso Reis Maria das Graças Carvalho Helton José dos Reis

Abstract

Background

Traditionally, the most effective therapy in the prevention of stroke in patients with atrial fibrillation (AF) has been oral anticoagulation with vitamin K inhibitors, particularly warfarin, whose disadvantages and adverse effects have led to their replacement by “direct oral anticoagulants”, as factor X inhibitor.

Objectives

This study aimed to conduct a brief approach on atrial fibrillation (AF) and use of Rivaroxaban, and to comparatively evaluate the prothrombin time / International Normalized Ratio (PT/INR) in patients with AF in use of this oral anticoagulant, depending on the time elapsed between the last administration of the drug and the time of blood sample venipuncture.

Methods

We evaluated 34 patients with AF in use of Rivaroxaban by using PT / INR, distributed into a subgroup with blood collection time ≤ 12 hours (n = 7) and > 12 hours after the last drug intake (n = 27). Mann-Whitney test was used to compare the groups and p < 0.05 was considered significant.

Results

An analysis as a function of time between the Rivaroxaban intake and blood collection, revealed that PT / INR suffers the greatest effect up to 12 hours after ingestion of the drug, dropping to levels close to normal in subsequent hours before the next dose.

Conclusion

We concluded that, in contrast to warfarin, the knowledge of the time interval between drug intake and blood collection from patients taking Rivaroxaban is essential to properly interpret a laboratory test to assess hemostasis, particularly PT and its derivatives. Int J Cardiovasc Sci. 2020; [online].ahead print, PP.0-0

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Original Article

The Role of Patent Foramen Ovale Closure in the Secondary Prevention of Cryptogenic Stroke: a Meta-Analysis Report

Sónia P. Pinto Pereira et al. Alzira Nunes Cristina Santos Scott E Kasner José P. L Nunes

Abstract

Background:

Patent foramen ovale (PFO) closure has been compared to medical therapy for secondary prevention of recurrent cryptogenic stroke.

Objectives:

To produce an updated meta-analysis including only data from the primary analyses of clinical trials and to evaluate the role of PFO closure in the secondary prevention of recurrent stroke.

Methods:

Search in Medline (PubMed) and in ISI Web of Knowledge. Parameters under analysis and meta-analyses were: stroke, transient ischemic attack (TIA) and atrial fibrillation (AF). Comprehensive Meta-analysis Software V.2.0 (Biostat) was used. Random-effects analyses were carried out. A level of significance of 5% was used.

Results:

In this study six, randomized trials enrolling 3,750 patients were included. Unlike other published meta-analyses on the same topic, in this case, only clinical trial data, and not follow-up data, were used. PFO closure, as compared with medical therapy alone, demonstrated superiority in reducing the rate of recurrent stroke (risk ratio with PFO closure vs. medical therapy, 0.37; 95% confidence interval [CI], 0.17 to 0.78; p = 0.01). PFO closure did not offer a significant benefit in prevention of TIA (risk ratio with PFO closure vs. medical therapy, 0.96; 95% CI, 0.64 to 1.44; p = 0.85). Among patients assigned to closure group, an increased risk of atrial fibrillation was seen (risk ratio with PFO closure vs. medical therapy, 4.64; 95% CI, 2.38 to 9.01; p < 0.01).

Conclusions:

In patients with cryptogenic stroke who had a patent foramen ovale, a protective effect of closure was seen concerning the risk of recurrent stroke, but not regarding the prevention of TIA.

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Editorial

Risk Scores for Stroke Prevention in Patients with Non-Valvular Atrial Prevention: Is it Time to Put Parameters of Left Atrial Appendage Morphology and Function Into Clinical Practice?

Angelo A. V. de Paola

Overall, one-third of thromboembolic events originated from the heart. Left atrial appendage (LAA) and its anatomic complexity has been implicated in 90% of cases of thrombus formation and cardioembolic events in patients with non-valvular atrial fibrillation (AF). Risk scores to predict thromboembolism from AF, such as CHADS₂ and CHA₂DS₂VASc are widely used to guide anticoagulation therapy and varies in relation to comorbidities associated with the thrombogenic substrate; however, because of its clinical conception, they did not include atrial anatomy (atrial enlargement), function (flow velocities) and electrophysiology (atrial fibrillation burden). Patients with CHA₂DS₂VASc score ≥ 2 are at intermediate or higher risk (event rate ≥ 2-3%/year) and anticoagulation is recommended. Left atrial variables such as LAA function and morphology, routinely studied by transesophageal echocardiography (TEE), were not considered in these scores.

In 2012, Di Biase et al.; published a retrospective study of 932 patients with AF and computed tomography (CT)/magnetic resonance imaging (MRI) classification of four different types of LAA morphologies: chicken wing, cactus, windsock and cauliflower. Non-chicken wing categories were 4 to 8 times more likely to have had stroke/TIA. Eight additional cross-sectional studies utilizing this classification for LAA morphology in 2,210 patients (6 with CT and 2 with TEE), found a significant association with non-chicken-wing morphology and stroke in 5 series^– and no significant difference in 3 other studies.^–

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Review Article

Effects of Exercise Training on Cardiovascular and Autonomic Parameters in Stroke Survivors: A Systematic Review

Bruno Bavaresco Gambassi et al. Fabiano de Jesus Furtado Almeida Ana Eugênia Araújo Furtado Almeida João Alberto Ribeiro … Tânia Maria Gaspar Novais Paulo Adriano Schwingel Ciro Oliveira Queiroz Clarcson Plácido Conceição dos Santos Bruno Rodrigues

Abstract

Negative changes in cardiovascular and autonomic variables in stroke survivors have encouraged the global scientific community to focus on investigating therapeutic strategies to mitigate stroke damage. The objective of the present study was to describe the effects of exercise training on cardiovascular and autonomic variables in stroke survivors. We used the PICO (population, intervention, control/comparison, and outcome variables) model for the search of articles in PubMed and Physiotherapy Evidence Databases from 2009 to December 2018. The following data were also recorded: type of study, author, year of publication, participants (time after stroke, sample size, and age) and benefits of exercise training. A total of 544 articles were initially selected, of which nine peer-reviewed articles met the search criteria. These nine studies enrolled 611 participants (middle-aged or elderly), and pointed to positive effects of training on maximal oxygen uptake, peak aerobic capacity, 6-minute walk test and resting heart rate. However, more well-controlled studies are needed to confirm the benefits of exercise training on cardiovascular and autonomic variables in this population.

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Original Article

Association between Morphodynamic Variables by Transesophageal Echocardiography and CHA2DS2-Vasc Values

Renata Rejane Linhares et al. Dalmo Antonio Ribeiro Moreira Luciana Braz Peixoto Andresa Paes da Cruz … Luara Piovam Garcia Rodrigo Bellio de Mattos Barretto David Costa de Souza Le Bihan Carlos Eduardo Suaide Silva

Abstract

Background:

In atrial fibrillation (AF), the CHA₂DS₂-VASc score calculates the risk for stroke. Di Biase classified the left atrial appendage (LAA), using magnetic resonance imaging, into 4 morphological types and correlated it with cerebrovascular events. Transesophageal echocardiography (TEE) also evaluates LAA and is a more widespread technique.

Objective:

To evaluate, using TEE, the possibility of characterizing LAA and to analyze its morphological aspects using the CHA₂DS₂VASc score.

Methodology:

A total of 247 patients were divided into three groups considering the CHA₂DS₂-VASc score: Group 1: 0 and 1; Group 2: 2 and 3 and, Group 3: ≥ 4 points. TEE produced the echocardiographic data. LAA was classified into thrombogenic and non-thrombogenic morphologies. In the analysis of statistical tests, a significance level of 5% was adopted.

Results:

The average age was 50 and 16.2% presented AF. In Group 1, we observed normal variables with a lower prevalence of AF (8.7%, p < 0.001). In group 2, spontaneous contrast was detected in 26.7%, (p < 0.001), thrombus in 6.7% (p = 0.079) and flow velocity in LAA < 0.4 m/s in 22.7% (p < 0.001) of the cases. Group 3 presented the highest percentages of AF (31.8%, p < 0.001), stroke/TIA (77.3%, p < 0.001), EF < 55% (18.2%, p = 0.010) and higher prevalence of thrombogenic type LAA (72.7%, p = 0.014). A higher occurrence of stroke/TIA was observed in patients with thrombogenic LAA (25.2%) compared to the non-thrombogenic group (11.2%), (p = 0.005).

Conclusions:

The thrombogenic morphology of LAA identified in TEE presented a higher risk of stroke regardless of the CHA₂DS₂VASc score. Patients with higher scores had greater abnormalities in echocardiographic variables.

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Original Article

Clinical impact of transesophageal echocardiography in patients with stroke without clinical evidence of cardiovascular sources of emboli

Solange Bernardes Tatani et al. Márcia Maiumi Fukujima João Augusto Costa Lima Luiz Darcy Cortez Ferreira … Claudia G. Monaco Ghefter Gilmar Fernandes Prado Zara Babayan Lyamara Apostólico de Azevedo

OBJECTIVE: The purpose of this study is to evaluate the impact of transeophageal echocardiography on management of patients at low-risk for cardiogenic embolism to prevent new potential cardiovascular sources of emboli. METHODS: We studied 69 patients with ischemic stroke at low-risk for cardiogenic embolism. Transeophageal echocardiography was performed to access: left atrium enlargement; communication or aneurysm of the interatrial septum; patent foramen ovale; spontaneous echo contrast or intracavitary thrombi; the presence of intraaortic atherosclerotic plaques or thrombi; significant valvar morphologic alteration or dysfunction; left ventricle enlargement, hypertrophy, or contractile abnormality. Transesophageal echocardiography altered clinical management, and we adopted anticoagulant therapy or another procedure apart from the use of acetylsalicylic acid. RESULTS: Transeophageal echocardiography detected at least one abnormality in 40 cases (58%). Clinical conduct was adjusted after the performance of transesophageal echocardiography in 11 patients (15.9%); anticoagulation was added in 10 cases and surgical correction in one patient. CONCLUSION: Transeophageal echocardiography was a very useful tool in the secondary prevention for stroke in patients at low risk for cardiogenic embolism.

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