Journal of Applied Physiology
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J Appl Physiol 17: 199-200, 1962;
8750-7587/62 $5.00
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Heart sounds of healthy Macaca mulatta

Robert L. Hamlin 1, F. R. Robinson 1, C. R. Smith 1, and William P. Marsland 1

1 Department of Veterinary Physiology and Pharmacology, The Ohio State University, Columbus, Ohio

Heart sounds were recorded from 13 healthy Macaca mulatta. The first heart sound began 0.036 sec after onset of QRS. Mean duration was 0.074 sec with an average of 6.4 vibrations. The period of systole was silent in all animals, and had a mean duration of 0.190 sec. The second heart sound was lower in magnitude than the first. Mean duration was 0.038 sec, with an average of 3.5 vibrations. The period of diastole was silent in nine animals and exhibited low frequency vibrations throughout the entire period in four animals. The average duration of diastole was 0.157 sec.

Submitted on August 16, 1961






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