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July 5, 1952


Author Affiliations

Citizens Building West Palm Beach, Fla.

JAMA. 1952;149(10):962. doi:10.1001/jama.1952.02930270056020

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To the Editor:—  In connection with the editorial in the Jan. 26, 1952, issue of The Journal, page 289, on the differential diagnosis between pulmonary embolism and myocardial infarction, I should like to refer you to a paper on the electrocardiographic changes in pulmonary embolism in the April, 1952, issue of the Florida Medical Journal (38:701-712)The electrocardiographic differentiation between the two, particularly that between infarction of the posterior wall and pulmonary embolism, can often be greatly facilitated by attention to the ST and T wave changes in the precordial V leads over the right side of the heart. In posterior wall infarction they are reciprocally elevated and increased in amplitude, never inverted; in pulmonary embolism they may either remain unchanged or show inversion, i. e., the right ventricular "strain pattern" of acute cor pulmonale.

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