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KMID : 0368119920220060976
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Korean Circulation Journal
1992 Volume.22 No. 6 p.976 ~ p.982
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The Effect of Meal on Cardiac Function in Healthy Young Men Evluated by Echocardiography
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이병준
정인권/차태준/이재우/김영곤/고용호
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Abstract
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Cardiovascular changes has been reported during eating and digestion. Experimetal studies showed an early rise in cardiac output during eating which was attributable to an increased heart rate. this changes reverted to baseline valuse at the end
of
eating.
To investigate postprandial cardiac functional change. we studied 20 healthy young men (average age 27 years) noninvasively with BP measurement, electrocardiography and M-mode echocardiograpy before. 30 minutes and 3 hours after a lunch (600
Kcal).
There was no significant changes in mean blood pressure after eating. On echocardiography. diastolic and systolic left ventricular internal dimensions were 4.9±0.4 and 2.9±0.3cm 30 minutes after eating. There was an average increase of 9% in
cardiac
output 30 minutes after meal. Fractional shortening was 36.4±6.4% before meal and 40.4±6.1% (p<0.05) 30 minutes after eating. Ejection fraction changed from 73.5±7.9% to 78.2±6.3% (p<0.05) at postprandial 30 minutes. Myocardial contractility
index
assessed by the ratio of systolic BP to end-systolic volume was 4.3±1.6mmHg/ml before meal and 5.3±2.2 mmHg/ml 30 minutes after eating. Peripheral resistance index as the ratio of mean blood pressure divided by cardiac index changed from
2.536±1.120dynes, S, cm -5/㎡ to 2.048±472 dynes, s, cm-5/㎡ at postprandial 30 minutes. Electorcardiographic study revealed no changes in ST segment. T wave and heart rate after a meal.
In conclusion. the increase of cardiac output after a moderate meal in healthy young mean was associated with an increase in myocardial contractility and a decrease in peripheral vascular resistance.
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