Victor Skumin
Skumin syndrome (:ru:Синдром Скумина) was described by Skumin in 1978 as a "cardioprosthetic psychopathological syndrome", associated with mechanical heart valve implant and manifested by irrational fear and sleep disorder.  Patients have doubts about the reliability of the device, fear of breakdown, and suffer anxiety and depression. This syndrome is often accompanied by asthenia.