A characteristic precordial repolarization abnormality with intermittent left bundle-branch block
We reviewed electrocardiograms of 23 patients with intermittent left bundle-branch block. A characteristic electrocardiographic pattern consisting of right and mid-precordial deep symmetrical T-wave inversions was detected during normal conduction in 19 of the 23. Of the seven patients who had cardiac catheterization, only two had findings suggestive or organic heart disease and only one had significant obstructive coronary disease. Thus we conclude that patients with intermittent left bundle-branch block frequently have T-wave inversions in right and mid-precordial leads during normal conduction that do not necessarily reflect coronary disease. These T-wave changes are similar to those after termination of chronic right ventricular pacing (left bundle-branch pattern), suggesting that both patterns of abnormal ventricular activation can produce abnormal repolarization when activation returns to normal.
Ischemia-induced transient left bundle branch block during exercise documented by 201Tl perfusion imaging
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Editorial: Cardiac or T wave Memory after Radiofrequency ablation of Right ventricular outflow tract ectopics
T-wave changes of cardiac memory caused by frequent premature ventricular contractions originating from the right ventricular outflow tract
Cardiac Conduction System
The cardiac conduction system is a specialized tract of myocardial cells responsible for maintaining normal cardiac rhythm. Discover the latest research on the cardiac conduction system here.