HARRY J. LOWEN; HAROLD E. B. PARDEE, F.A.C.P.
Large Q waves in Lead III are an important sign of myocardial infarction and frequently are a permanent remainder of the event after all other abnormalities have disappeared from the electrocardiogram. They may also be the result of chronic degeneration of the myocardium. Since the importance of these waves was pointed out in 19301 and it was recognized that they might be found occasionally in normal hearts, there have been repeated attempts to find criteria to decide whether a large Q3 in a given record has a normal or abnormal significance. With the advent of the chest leads, data were
LOWEN HJ, PARDEE HEB. UNIPOLAR EXTREMITY LEADS IN RECORDS WITH LARGE Q31. Ann Intern Med. ;31:456–462. doi: 10.7326/0003-4819-31-3-456
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Published: Ann Intern Med. 1949;31(3):456-462.
Cardiology, Hospital Medicine.
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