A heart attack claimed the life of former WWE manager Paul Bearer, who passed away two weeks ago at the age of 58.

According to a story on TMZ.COM, the death certificate of William Moody lists supra ventricular tachycardia, SVT, as the cause of death. SVT is a rapid heart rhythm which is often treated and not always fatal.

His son Michael says that doctors believe his dad was struggling with SVT in the last few weeks of his life as symptoms are very similar to anxiety and heartburn.