extracorporeal circulation

IJCS

Editorial

Is Bovine Heparin, an Old Fellow, a Safe Anticoagulation Approach during Extracorporeal Circulation Inside the Cardiac Operating Room?

Ivis Levy Fernandes Martins et al. Christianne Bretas Vieira Scaramello

Antithrombotic agents include anticoagulants, antiplatelet and fibrinolytic drugs. They are prescribed in several situations related to hemostasis disturbances that favor thrombi formation. Since bleeding is a common adverse effect of these drugs, a cost-benefit analysis of antithrombotic therapy prior to surgery should be performed. In order to consider the preoperative therapy for patients undergoing cardiac surgery, the risk of thrombosis must outweigh the risk of bleeding. Nonetheless, the literature has reported the use of anticoagulant therapy with unfractionated heparin (UFH) during extracorporeal circulation (ECC) inside and outside the cardiac operating room.^–

The development of the heart-lung machine made ECC possible. Therefore, heart surgery became a routine practice. The literature describes that complications related to ECC have diminished due to modern monitoring, highly trained staff, special cannulation methods, as well as the latest advances in techniques. However, some authors suggest that guidelines based on more researches would improve the safety of this procedure. During cardiac surgery, ECC preserves the functional characteristics of the heart, provides a clean surgical environment and offers safety to the team.

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IJCS

Original Article

A Retrospective Study on Unfractionated Bovine Heparin Safety in On-Pump Cardiac Surgery

Fernando Antonio de Lima Torres et al. Andressa C. B Torres Allinson Ribeiro Cauê O Maia … Fernanda P Almeida João Roceto Jorge A Matkovski Matheus G Kovalski Vanessa A Pizato Tatiana M. G Cordeiro

Abstract

Background:

Heparin decreases the risks of thrombotic phenomena in extracorporeal circulation. However, it must present a robust safety profile itself, especially for bleeding. Contamination of porcine heparin demands an alternative source and consequent assessment of safety.

Objective:

To evaluate the safety of unfractionated bovine heparin during on-pump cardiac surgery.

Methods:

Descriptive, retrospective study, evaluating medical records from all patients who had on-pump cardiac surgery over four years. We observed the occurrence of bleeding, thrombocytopenia, postoperative vasoplegia, activated clotting time values and any other coagulation phenomena as safety profile parameters.

Results:

We evaluated 204 medical records reporting the use of unfractionated bovine heparin. 66.18% of the patients presented thrombocytopenia, 1.04% presented bleeding of more than 2000 mL in the first 24 hours of the postoperative period. One patient presented clots in the surgical field. Median activated clotting time was 137 seconds at baseline, 803 seconds after the first dose of heparin and, after protamine, it returns to similar baseline values, that is, 149.5 seconds.

Conclusion:

Unfractionated bovine heparin did not present unusual adverse effects and can be considered safe for on-pump cardiac surgery.

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Original Article

Risk factors for acute myocardial infarction during the postoperative period of myocardial revascularization

José Ribamar Costa Jr. et al. Dinaldo C. Oliveira Alexei DerBedrossian Enilton T. Egito … Edson R. Romano Marcos O. Barbosa Ieda M. Liguori Jorge Fahran Luis C. B. Souza Adib D. Jatene Leopoldo S. Piegas

OBJECTIVE: To identify risk factors for acute myocardial infarction during the postoperative period after myocardial revascularization. METHODS: This was a case-control study paired for sex, age, number, type of graft used, coronary endarterectomy, type of myocardial protection, and use of extracorporeal circulation. We assessed 178 patients (89 patients in each group) undergoing myocardial revascularization, and the following variables were considered: dyslipidemia, systemic hypertension, smoking, diabetes mellitus, previous myocardial revascularization surgery, previous coronary angioplasty, and acute myocardial infarction. RESULTS: Baseline clinical characteristics did not differ in the groups, except for previous myocardial revascularization surgery, prevalent in the case group (34 patients vs. 12 patients; p = 0.0002). This was the only independent predictor of risk for acute myocardial infarction in the postoperative period, based on a multivariate logistic regression analysis (p=0.0001). Mortality and the time of hospital stay of the case group were significantly higher (19.1% vs. 1.1%; p<0.001 and 15.7 days vs. 10.6 days; p<0.05 respectively) than those of the control. CONCLUSION: Only previous myocardial revascularization was an independent predictor of acute myocardial infarction in the postoperative period, based on multivariate logistic regression analysis.

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Is Bovine Heparin, an Old Fellow, a Safe Anticoagulation Approach during Extracorporeal Circulation Inside the Cardiac Operating Room?

A Retrospective Study on Unfractionated Bovine Heparin Safety in On-Pump Cardiac Surgery

Abstract

Background:

Objective:

Methods:

Results:

Conclusion:

Risk factors for acute myocardial infarction during the postoperative period of myocardial revascularization

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Formato de Documento Eletrônico (ABNT)

Formato de Documento Eletrônico (APA)

Formato de Documento Eletrônico (ISO)

Formato de Documento Eletrônico (Vancouver)

Formato de Documento Eletrônico (ABNT)

Formato de Documento Eletrônico (APA)

Formato de Documento Eletrônico (ISO)