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.

Adult↗

PubMed1978

[Atrial tachycardia with atrioventricular block].

A clinico-electrocardiographic analysis of 25 cases with atrial tachycardia and atrioventricular block was conducted. Confirmation was established of the connection between the development of atrial tachycardia with atrioventricular block and changes in the myocardium, circulatory insufficiency, acute coronary failure and toxicosis with cardiac glucosides. Such signs of atrial tachycardia with atrioventricular block as the rate of atrial rhythm of 150 to 250 per minute, the possibility of fluctuations in the P-P interval, the presence of an isoelectric PP segment, and atrioventricular block of various degree were found to be of the highest diagnostic value. It is presumed that the development of atrioventricular block in atrial tachycardia is linked with changes in the conducting system of the heart.

Adult↗

PubMed1976