35 years in cardiovascular surgery. Since 1990 full professor for cardiovascular surgery and since 1994 full professor and chairman of the department for cardiovascular surgery at the University Hospital Marburg/Germany.
2 research sabaticals at the Heinemann Research Institute, Carolinas Heart Center, Charlotte NC in 1989 and 1990, electrophysiology and arrhythmia laser surgery
Member of the DGTHG (German Society for Thorax, Heart and Vascular Surgery) DIVI ( German Society for Interdisciplinary Intensive Care Medicine), STS, AHA, AAAS
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