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Andy Griffith's death certificate reveals that the actor's passing was caused by a heart attack, according to The Associated Press.

RELATED: Andy Griffith Dies at 86

The certificate reportedly states that the 86-year-old suffered from years of coronary artery disease, hypertension and possibly high cholesterol or high triglycerides. The document goes on to reveal that Griffith fell victim to a heart attack 24 hours before his death.

Andy Griffith died the morning of July 3. The star's family later released a statement to ET, revealing that Griffith died "at his home in Manteo, N.C., with his wife Cindi at his side."

Although he has over 50 film and TV credits to his name, Griffith will perhaps best be remembered for his role as Sheriff Andy Taylor on The Andy Griffith Show (1960-1968). Much later in his career he portrayed a criminal defense lawyer in the TV series Matlock (1986-1995).