updated 07/06/2012 AT 10:00 AM ET
•originally published 07/06/2012 AT 7:50 AM ET
It was a heart attack on Monday that took the life of Andy Griffith the following day, his death certificate states.
According to the certificate filed Thursday in Dare County, N.C., and obtained by PEOPLE, the iconic TV star, 86, suffered the attack 24 hours before he died at 7 a.m. Tuesday at his home on Roanoke Island in his native North Carolina.
In addition, the document says that he suffered for years with a variety of illnesses that included coronary artery disease, hypertension and hyperlipidemia, a form of high cholesterol.
Griffith, who first became a national institution as Sheriff Andy Taylor of Mayberry on the ’60s TV favorite The Andy Griffith Show, was buried less than five hours after his death, reports CNN.