Journal article
Left ventricular internal diameter and cardiac function during exercise
Journal of applied physiology (1948), Vol.30(4), pp.473-478
04/1971
DOI: 10.1152/jappl.1971.30.4.473
PMID: 5572762
Abstract
The response of the cardiovascular system to exercise by swimming was studied in nine dogs. Measurements of left ventricular internal diameter, left ventricular pressure, cardiac output, and heart rate were recorded continuously during periods of control, exercise, and recovery. During exercise, end-diastolic pressure increased by 21 mm Hg, end-diastolic diameter increased from 34.3 to 36.6 mm, and stroke diameter from 5.9 to 8.3 mm. The mean heart rate increased from 95 to 262 beats/min and stroke volume from 1.6 to 2.1 ml/kg. The diastolic filling period decreased by 88y0 from the control and the duration of systole exceeded that of diastole during exercise. It is conchded that during strenuous exercise the heart increases its output by increases in both heart rate and stroke volume and that the increased stroke volume is partially due to a Frank-Starling mechanism as shown by an increased end-diastolic left ventricular diameter.
Details
- Title: Subtitle
- Left ventricular internal diameter and cardiac function during exercise
- Creators
- Howard H EricksonVernon S BishopMerrill B KardonLawrence D Horwitz
- Resource Type
- Journal article
- Publication Details
- Journal of applied physiology (1948), Vol.30(4), pp.473-478
- DOI
- 10.1152/jappl.1971.30.4.473
- PMID
- 5572762
- ISSN
- 0021-8987
- eISSN
- 2691-2473
- Language
- English
- Date published
- 04/1971
- Academic Unit
- Cardiovascular Medicine; Internal Medicine
- Record Identifier
- 9984656598202771
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