Ozzy Osbourne's cause of death has reportedly been determined. The former Black Sabbath frontman and reality TV personality died of "out of hospital cardiac arrest" and "acute myocardial infarction," with coronary artery disease and Parkinson's disease with autonomic dysfunction listed as "joint causes at age 76 on July 22.

Ozzy Osbourne’s cause of death has officially been revealed. The singer died from cardiac arrest, acute myocardial infarction, coronary artery disease and Parkinson's disease, according to a death certificate obtained by U.