THERE are two types of electrocardiograms in which the main deflection of the QRS complex is directed downward in the three standard leads: those in which prominent Q waves appear in one or more leads, owing to myocardial infarction or severe myocardial damage, and those in which only prominent S waves appear, associated with right ventricular dilatation or hypertrophy, owing to pulmonary disease or other causes. It is the purpose of this study to examine the prominent S wave pattern found in nine cases of congenital heart disease and one of chronic pulmonary disease.
Burstein and Ellenbogen1 found nine cases of the two types of pattern in a series of 15,000 electrocardiograms. In eight of their cases coronary occlusion had occurred, and in six pulmonary disease had been or was present. Marcus and Schwartz2 have described seven cases of deep S wave pattern in patients with
LEVINTHAL J, PURDY A. ELECTROCARDIOGRAMS WITH DEEP S WAVES IN ALL THREE STANDARD LEADS: Report of Ten Cases. AMA Am J Dis Child. 1951;81(1):59–80. doi:10.1001/archpedi.1951.02040030066012
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