Tricuspid Valve in Ebstein's Anomaly

the ratio of [K+]I is reduced and loss of negativity [K+ 10 (depolarization) results. Thus, perhaps again in an overly simplistic explanation, the effect of K+ depends on the type of cell, what property, e.g., automaticity or conduction is under consideration. Perhaps, more importantly, explanations for some of the observed electrophysiological effects of K+, defy accurate description and must await further study. CHARLES FIsCH, M.D, Professor of Medicine Director, Cardiovascular Division Indiana University School of Medicine Indianapolis, Indiana