Sudafed and Heart Attacks...Any Connection?

I was helping my best friend move last Friday when he suffered a massive heart attack. I performed CPR on him along with the EMT's and the hospital...he never recovered. The coroner called and wanted to know if he was taking any medications because he had a large amount of Sudafed in his system. My wife talked with a friend of ours who is a nurse and she mentioned that there is a possible connection with Sudafed and heart attacks. Has anyone else heard of this?