Criteria to select proper valve prosthesis for aortic valve replacement. Comparative assessment of various valve prostheses via continuous wave Doppler echocardiography

M. Shigenobu, S. Sano

研究成果査読

9 被引用数 (Scopus)

抄録

Continuous wave Doppler echocardiography was used to measure pressure gradients (PG) across various aortic valve prostheses [St. Jude Medical (SJM) valve: 55 cases; Bjork-Shiley (B-S) valve: 18 cases; Lillehei-Kaster (L-K) valve: 25 cases; and Omniscience (O-S) valve: 49 cases]. Disc-opening angles of the L-K and O-S valves were measured via cineradiography. Pressure gradient across the SJM valve tended to be low. Increase in pressure gradients during exercise tended to be greater in the small valves. There was a significant correlation between the valve area index (VAI) and pressure gradients in the SJM valve (PG = 85.3 - 40.2 x VAI, r = -0.71, p < 0.005) and in the B-S valve (PG = 64.6 - 23.3 x VAI, r = -0.89, p < 0.025). To keep pressure gradients below 20 mmHg, SJM valve 23 and B-S valve 25 should be selected for patients with a body surface area of 1.3-1.7 m2. In the L-K and O-S valves, there was no significant correlation between VAI and PG, likely because the disc-opening angles of these valves were suboptimal-averaging 57° in the L-K valve and 47° in the O-S valve. None of the patients with SJM or B-S valves had pressure gradients of 50 mmHg or above. However, pressure gradients exceeded 50 mmHg in 7 cases with the L-K valve (28%) and 10 with the O-S valve (20%), suggesting the necessity of careful follow-up in patients with these prostheses.

本文言語English
ページ(範囲)203-208
ページ数6
ジャーナルJournal of Cardiovascular Surgery
34
3
出版ステータスPublished - 1993
外部発表はい

ASJC Scopus subject areas

  • 外科
  • 循環器および心血管医学

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