October 30, 1980 Appeal from decisions of the Workers' Compensation Board, filed August 16, 1978, May 24, 1979, September 25, 1979 and September 29, 1979, which held that claimant's decedent suffered a myocardial infarction on January 31, 1975 which constituted an accident within the meaning of the Workers' Compensation Law and resulted in his causally related death. The board found: "based on the hospital records, the history given by decedent to Dr. Hayman, the widow's testimony and the testimony