SINUS NODE FUNCTION, SINOATRIAL AND ATRIA L CONDUCTION, RUNNING OF SUPRAVENTRICULAR ARRHYTHMIA IN CORONARY HEART-DISEASE PATIENTS PRIOR TO AND AFTER AORTOCORONARY BYPASS

Selective coronarography, assessment of hemodynamics, sinus node funct ion, sinoatrial and intraatrial conduction were performed in 53 corona ry heart disease (CHD) patients with supraventricular arrhythmia. The severity of cardiac rhythm paroxysms was evaluated at transesophageal pacing by measurements of arrhythmia induction frequency threshold. 29 patients underwent aortocoronary shunting. No relationships were foun d between the pattern of arrhythmia, degree of stenosis, number of cor onary lesions. Aortocoronary bypass changed neither pattern nor severi ty of supraventricular arrhythmia.