Born Mar. 19, 1906, in Serenča, Yugoslavia. Czech surgeon. Academician of the Czechoslovak Academy of Sciences (1965). Member of the Communist Party of Czechoslovakia since 1945.
Šiška graduated in 1932 from the medical school of Charles University in Prague. He took part in the Slovak national uprising of 1944. He became chief of the surgery clinic of Komenský University of Bratislava in 1950 and director of the Institute of Experimental Surgery of the Slovak Academy of Sciences in 1955. His work has dealt mainly with experimental and clinical surgery of the heart and lungs and with artificial blood circulation.
Šiška is a foreign member of the Academy of Sciences of the USSR (1971) and the Academy of Medical Sciences of the USSR (1969). He also is an honorary member of the J. Purkinje Society and the Society of Polish Surgeons. Šiška was vice-president (1961–65) and president (1970–74) of the Slovak Academy of Sciences and vice-president (1970–74) of the Czechoslovak Academy of Sciences. He was a member of the central committee of the Communist Party of Slovakia (1958–62) and of the Communist Party of Czechoslovakia (1962–76). Since 1969 he has served as deputy of the Slovak National Council. SiSka has been awarded five orders and several medals.