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Br Heart J. Oct 1947; 9(4): 275–282.
PMCID: PMC503594
THE FIRST HEART SOUND IN AURICULAR AND VENTRICULAR EXTRASYSTOLES
Pedro Cossio, Ricardo G. Dambrosi, and H. F. Warnford-Thomson
Cardiological Department, Semiological Institute, Buenos Aires
Cardiovascular Clinic, British Hospital, Buenos Aires
Articles from British Heart Journal are provided here courtesy of
BMJ Group