Multifocal atrial tachycardia

Abstract

Of 13 cases of multifocal atrial tachycardia (MAT), 11 had chronic bronchitis and obstructive emphysema with pulmonary infections (7 cor pulmonale and 4 coronary heart disease). This arrhythmia often occurs in cases where the clinical condition is severe and may cause further deterioration of cardiopulmonary function. Diffuse lesion of the atrial musculature may be the pathologic basis of MAT, while the presence of multiple ectopic foci and probably disturbances in the atrial conduction system from its electrophysiologic basis. Mortality is very high. It is suggested that treatment be directed at abolishing or relieving the underlying diseases, including control of infections and improvement of cardiopulmonary function.