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1 Research Associate, Division of Cardiology, The Chicago Medical School.
2 Attending Cardiologist, St. Peter's Hospital, Albany, New York.
A phonocardiographic study was made in 100 old persons selected because of the absence of data indicating heart disease.
The heart sounds were found to slightly decrease in duration with advanced age.
Collateral data which were collected were: pulse rate, duration of ventricular systole, QT ratio, hematological, roentgenological and sphygmographic data.
The above tabulated phonocardiographic data can be used for comparison n the study of tracings of old patients presenting murmurs or other auscultatory abnormalities.
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