Looks like ZYZZ also had a congenital heart defect. All genetic. Nothing to do with steroids.
On 5 August 2011, Shavershian suffered a heart attack in a sauna, while on holiday in Pattaya.[28] He was taken to a hospital, where doctors were unable to revive him.[4][19][11] His family and friends placed news of his death on Facebook. His death was confirmed on 9 August 2011 by the Department of Foreign Affairs and Trade (DFAT).[7] An autopsy revealed a previously undiagnosed congenital heart defect.[7] His family stated he had shown several minor symptoms in the few months leading up to August 2011, including high blood pressure and occasional shortness of breath. He had a family history of heart problems.[7]