1091 patients with 1336 adjustable valves – a 22-year experience

A. Aschoff, A. Piotrowicz, B. Vienenkoetter, P. Schiebel, H. Baechli & D. Haux
Objective: Adjustable valves (AV) were introduced by Bush/Matson about 1951, Kuffer 1969, Portnoy 1973 (On-Off), Sophysa & Medos-P 1984 (in clinics 90), followed by STRATA-, ProGAV- and ProSA-valves. Major AV-series are rare and long-term results completely missing. Methods: Since 1988 [for full text, please go to the a.m. URL]