ASSOCIATION OF MYOCARDIAL INFARCTION AND SURGICAL REVASCULARIZATION WITH DYNAMICS OF CARDIAC RHYTHM DISTURBANCES IN CHRONIC HEART FAILURE DUE TO ISCHEMIC HEART DISEASE

Abstract

The research study aimed to conduct a comparative analysis of detected cardiac rhythm disturbances before and after surgical myocardial revascularization in patients with chronic heart failure related to ischemic heart disease.
A total of 120 patients with II-III functional class chronic heart failure related to ischemic heart disease were examined. Clinical assessment included the description of anthropometric data, clinical course, laboratory and instrumental examination findings, including Holter electrocardiography monitoring.
Two variables were analyzed as factors contributing to the onset or progression of cardiac rhythm disturbances: a) prior myocardial infarction, and b) coronary artery bypass grafting surgery and angioplasty with stenting of coronary arteries. An independent factor associated with the occurrence of cardiac rhythm disorders was identified: the presence of myocardial infarction resulting in the development of postinfarction cardiosclerosis. The factor associated with reduction of cardiac rhythm disturbances in the long term - revascularizations by aortocoronary bypass or angioplasty with stenting of the affected coronary vessels - was also determined.
The obtained results of the study indicate a significant influence of structural rearrangement and electromechanical instability of myocardium due to myocardial infarction on the occurrence and progression of cardiac rhythm disturbances in patients with chronic heart failure. A factor associated with the reduction of cardiac rhythm disturbances in the long term - revascularization by aortocoronary bypass and/or angioplasty with stenting of the affected coronary vessels - was identified.