Michael Moody the Son of WWE legend Paul Bearer (William Moody) told TMZ.com that his farther died aged 58 of a heart attack with his cause of death being listed as supraventricular tachycardia (SVT) -  a dangerously high heart rate.

The report goes on to note that SVT isn't usually deadly if treated however, the signs can manifest as anxiety and heartburn which Bearer probably dismissed in the final weeks of his life.