THOMAS T. BRACKEN, Petitioner, v. WORKERS' COMPENSATION APPEALS BOARD, COMMERCIAL CARRIERS, INC. , et al. , Respondents (Opinion by Klein, P. J. , with Danielson and Croskey, JJ. , concurring. )We hold the Board's decision must be annulled because the Board erred in concluding the cardiovascular injuries were not industrial. Specifically, that heart attack progressed in degree later that month and then gave rise in April, 1986, to a stroke. Dr. Gillis stated he knew of no medical literature that says the worse the heart attack, the greater the likelihood of stroke. It is common knowledge in medical literature that massive heart attacks go on to develop cerebral strokes soon thereafter.

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