title: Clinical experience of Hall-Kaster valve. Operative results and hemodynamic studies.
abstract: The Hall-Kaster pivotal disc prosthetic valve (HK valve) was introduced in 1977. Since October 1979, we have used the HK valve in 137 patients for valve replacement. The over-all operative mortality was 5.1%. During 36 months follow-up, there were 3 late deaths due to congestive heart failure, but no valve related death, no mechanical failure and no thromboembolic episode have been encountered. Intraoperative hemodynamic studies revealed its valvular function to be excellent. The mean pressure gradients across the prosthesis were 11.0 +/- 1.6 and 4.2 +/- 2.0 mmHg in aortic and mitral position, respectively. The mean calculated valve areas were 1.7 +/- 0.6 and 3.7 +/- 1.2 cm2 in aortic and mitral position, respectively. Thus, the Hall-Kaster prosthetic valve was found to be an efficient and favorable prosthetic heart valve for aortic and mitral valve replacement.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001021:Aortic Valve; D002648:Child; D005260:Female; D005500:Follow-Up Studies; D006350:Heart Valve Prosthesis / Q000401:mortality; D006439:Hemodynamics; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve; D011183:Postoperative Complications