[New study methods and their significance for the diagnosis of heart rhythm disorders].

The author discusses the results of examination conducted by means of continuous ECG recording for many hours, intracardiac electrography, and programmed electric stimulation of the heart in patients with ischemic heart disease and arrhythmias. It was established that ventricular extrasystoles, including the so-called precursors of ventricular fibrillation, are recorded in most patients suffering from chronic ischemic heart disease and acute myocardial infarction, in 66 and 95% of those examined, respectively. The article gives the electrophysiological criteria of the diagnosis of sino-atrial, atrial, nodal atrio-ventricular, supraventricular in additional paths of stimulation conduction, and ventricular paroxysmal tachycardia.