| Assessment of Cardiac Output by Doppler Ultrasound Technique Alone. |
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Young Ho Ahn, Sung Min Choi, Nam Geun Heo, Sang Bum Lee |
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Department of Pediatrics, College of Medicine, Kyungpook National University, Taegu, Korea |
| Doppler검사에 의한 심박출량의 평가 |
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안영호, 최성민, 허남근, 이상범 |
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경북대학교 의과대학 소아과학교실 |
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Received: 23 February 1990 • Accepted: 24 April 1990 |
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| Abstract |
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The normal range of ascending aortic blood velocity was determined in 23 healthy children
including 8 newborn infants and compared with 12 anemic children, using a pulsed Doppler
ultrasound technique from suprasternal long axis view.
Integration of the area under the velocity-time curve for each heart beat gave stroke distance,
which, when multiplied by heart rate, gave minute distance. Stroke distance and minute distance
are an indication of stroke volume and cardiac output respectively.
Stroke distance of healthy children over the age of one (23.76±4.03cm) was higher than that of
healthy children under the age of one (13.94±1.85 cm) by 70.4% and minute distance of healthy
children over the age of one (2,257±364 cm/min) was higher than that of healthy children under
the age of one (1,752±286 cm/min)by 28.8%(p<0.01). Minute distance gave the greatest discrim-
ination between healthy children (2,015±413cm/min) and anemic children (2,708±503cm/min)
and was increased in anemic children by 34.4% (p<0.01).
Measurement of ascending aortic velocity and its derivation alone, without determination of aortic
cross sectional area, is a safe, simple, and physiologically valid way of assessing cardiac, output. |
| Key Words:
Doppler ultrasound, Stroke distance, Minute distance, Cardiac output |
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