Ric Ocasek’s cause of death has been revealed as heart disease.

According to the Daily News, the medical examiner determined that his cause of death was hypertensive and atherosclerotic cardiovascular disease. Ocasek also suffered from pulmonary emphysema, which contributed to his death.

The Cars frontman was found dead in his New York apartment yesterday (Sept. 15). Although he had recently undergone an unnamed surgical procedure, he had been expected to make a full recovery.

Read the full story on Ultimate Classic Rock.