Ventricular arrhythmias are recorded in most patients at coronary bypass surgery without extracorporeal circulation. The stages, such as the pulling of the sternal edges apart, the opening of the pericardium, the revision and dislocation of the heart, and revascularization of coronary arteries, are most dangerous due to the fact that they may lead to the development of arrhythmias. The major proarrhythmogenic factors at coronary bypass surgery without extracorporeal circulation are mechanical irritation of reflexogenic areas and myocardial ischemia, the mechanical factors playing the leading role in the development of ventricular arrhythmias.
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