[Structural and functional parameters of the myocardium and atrial natriuretic peptide in atrial fibrillation].

The plasma level of atrial natriuretic factor and its relation to intracardiac and systemic hemodynamic parameters were examined in patients with coronary heart, rheumatic and mitral valvular diseases, neurocirculatory dystonia which were complicated by atrial fibrillation. The concentration of atrial natriuretic factor was found to vary with the left ventricular myocardial mass, left atrial contractility, antiarrhythmic therapy intensity and efficacy.