The article gives a clinical and electrocardiographic analysis of 16 cases with chaotic atrial rhythm in ischemic heart disease and in diseases which cause overexertion, dilatation, and changes of the atrial myocardium. The significance of such diagnostic criteria of chaotic atrial rhythm as the presence of three or more different P waves in each ECG lead, the absence of a dominative atrial pacemaker, differnt P--P, P--R, and R--R periods, and the isoelectrical PP segment is confirmed. Symptoms are pointed out for differentiating chaotic atrial rhythm from polytopic atrial extrasystole, cardiac fibrillation, and supraventricular pacemaker migration. The expediency of separating chaotic atrial rhythm as an independent form of atrial arrhythmias is emphasized. The use of isoptin, agents bloking beta-adrenergic receptors, lidocaine, and cardiac glycosides in chaotic atrial rhythm is recommended.
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