Myocardial strain – ABC CARDIOL

ABCIC

Case Report

Analysis of Post-Systolic Shortening, Myocardial Strain, and Arterial Flow to Assess Myocardial Ischemia during Stress Echocardiography

Marilia Esther Benevides de Abreu et al. Renan Abreu Ponte Freire Luana Priscila G. Santos Isadora Sucupira Machado … Tereza Cristina Diógenes Pinheiro Antônio Augusto Guimarães Lima José Sebastião de Abreu

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ABCIC

Original Article

Myocardial Deformation (Strain) and Myocardial Fibrosis in Mild Cardiac Chagas Disease

Polyana Evangelista Lima et al. Rafael de Castro da Silva André Maurício Souza Fernandes Marta Silva Menezes Edmundo José Nassri Camara

Abstract

Background:

The early identification of myocardial damage seems important in the management of patients with Chagas disease. However, it is unknown whether speckle tracking echocardiography strain and cardiac magnetic resonance imaging are promising methods for assessing myocardial involvement and fibrosis, respectively.

Objective:

To evaluate myocardial involvement in the mild chronic cardiac form of Chagas disease using speckle tracking strain and myocardial fibrosis by cardiac magnetic resonance and assess their correlations.

Method:

This cross-sectional study analyzed patients with the mild chronic cardiac form of Chagas disease (preserved ejection fraction) using speckle tracking echocardiography and cardiac magnetic resonance.

Results:

The study included 21 participants (women: 62%; age: 54 ± 5 years). The prevalence of myocardial fibrosis was 50% on delayed myocardial enhancement. The median global longitudinal strain was decreased (14.1%; interquartile range, 12.1–16.3%) in 17 patients (81%). The mean T1 mapping value was high in patients with Chagas disease (993 ± 163 ms). The T1 map was significantly correlated with the global longitudinal strain (r = 0.634; p = 0.015). In addition, the mechanical dispersion index obtained by strain was increased (>55 ms) by 84%, with the largest area under the receiver operating characteristic curve (area under the curve, 0.696; 95% confidence interval, 0.412–0.981) for fibrosis discrimination by delayed myocardial enhancement.

Conclusion:

Myocardial strain and T1 mapping are early markers of myocardial damage in mild chronic Chagas heart disease. The mechanical dispersion index was high and the most closely correlated with delayed myocardial enhancement.

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Artigo Original

Evaluation of segmentary contractility in Chagas' disease by using the integral of the myocardial velocity gradient (myocardial strain) obtained through tissue Doppler echocardiography

Carlos Eduardo Suaide Silva et al. Luiz Darcy Cortez Ferreira Luciana Braz Peixoto Claudia Gianini Monaco … Manuel Adán Gil Juarez Ortiz Bárbara Maria Ianni José Lázaro Andrade Wilson Mathias Júnior Antônio Carlos Pereira Barretto

OBJECTIVE: To quantify the percentage of contractility of different myocardial segments in patients with Chagas’ disease by measuring myocardial strain and to assess the differences in the radial and longitudinal ventricular contractile function in the undetermined and dilated forms of chronic chagasic cardiomyopathy as compared with those in a group of healthy individuals. METHODS: The study comprised 39 individuals [20 (51.3%) of the male sex] divided into the following 4 groups: 1) Nl: 17 (43.6%) healthy individuals; 2) Und: 7 (17.9%) patients with the undetermined form of Chagas’ disease; 3) C1: 7 (17.9%) patients with the chronic form of Chagas’ disease with ejection fraction 50%. After performing baseline echocardiography, Doppler tissue images were recorded to measure myocardial strain in different segments on longitudinal and transversal parasternal, and apical 2- and 4-chamber views. RESULTS AND CONCLUSION: The percentage of contractility in the different myocardial segments, both the radial and longitudinal components, is greater in healthy individuals than in patients with the chronic form of Chagas’ disease, and in those with the undetermined form of the disease as compared with that of chronic chagasic patients with EF < 50%. Left ventricular radial contractility is greater than left ventricular longitudinal contractility in all groups (Nl, Und, and Chronic). The data presented allow us to propose a progressive character of myocardial impairment in patients with Chagas' disease.

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Analysis of Post-Systolic Shortening, Myocardial Strain, and Arterial Flow to Assess Myocardial Ischemia during Stress Echocardiography

Myocardial Deformation (Strain) and Myocardial Fibrosis in Mild Cardiac Chagas Disease

Abstract

Background:

Objective:

Method:

Results:

Conclusion:

Evaluation of segmentary contractility in Chagas' disease by using the integral of the myocardial velocity gradient (myocardial strain) obtained through tissue Doppler echocardiography

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Electronic Document Format (Vancouver)

Electronic Document Format (ABNT)

Electronic Document Format (APA)

Electronic Document Format (ISO)

Electronic Document Format (Vancouver)

Electronic Document Format (ABNT)

Electronic Document Format (APA)

Electronic Document Format (ISO)