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The number of publications dedicated to the subject of phonocardiography is on a steady increase. They deal with the technic of recording, description of new apparatus or interpretation of tracings. In view of the growing interest of the medical profession in heart sound recording there is a need for a comprehensive monograph on this subject. Thanks to his extensive experience, the author was well qualified to fill this gap and he accomplished his task in an enviable manner. After a succinct discussion of the diagnostic and didactic value of phonocardiography and a brief historical review, he describes the most popular apparatus for heart sound recording and proceeds to analyze systematically the graphs in various cardiac lesions. Cambridge, Minot and Siemens recording apparatus were used by the author. To facilitate the interpretation of the tracings, simultaneous phlebograms or preferably electrocardiograms were made. There is no trace of loquacity, the style is
A fonocardiografia. JAMA. 1940;115(25):2205. doi:10.1001/jama.1940.02810510081038
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