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Keimyung Medical Journal 1988;7(2):310-316.
Doppler echocardiographic evaluation of patients with tissue or mechanical valves: Peak velocity and mean velocity through prosthetic mitral valves
승모판대치술후 도플러 심초음피를 이용한 인공 판막의 종류에 따른 최대혈류속도와 평균혈류속도에 관한 연구
박선우; 김권배; 김윤년; 김기식
Abstract
The conventional non-invasive and invasive technique have limitations in evaluating cardiac prosthetic valves but recently; it is known that Doppler echocardiography is a reliable method for evaluation of native valves and artificial valves. We have used continuous wave Doppler echocardiography to evaluate 48 patients with tissue and mechanical mitral valves implanted within 4 months prior to examination. The results are as follows. 1) Of these patients; male are 20 and female are 28. The mean ages of male are 35. 60 (yr) and female are 41.82. 2) The differences of peak and mean velocities of prosthetic cardiac valves between male and female are not significant; but the differences of valvular size between male and female are sig.nificant(male: 31.00±1.30(mnO; female: 29.36±2.11; p<0.01). 3) The differences of size and flow velocities between mechanical (Edwards-Duromedics) and tissue(lonescue-Shiley) valves are not significant; but the ages of patients with mechanical valves are significantly lower than tissue valves (mechanical valve ; 34. 05±11.28; tissue valve ; 43. 62±11.26; p< ?. 01). 4) The differences of flow velocities between mechanical and tissue valves; sizes of which are 31mm; are significant statisticallyCpeak velocity; 130.15+24.59 vs 110. 00+19.41; mean velocity; 74.79 ±23.14 vs 51.38±12.71; p<0.01). 5) The sizes of valves are larger; the peak and mean velocities are lower; but it is not significant statistically. The results indicated that Doppler echocardiography is a useful method for evaluating functions of prosthetic valves.
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