<prompt> If you are a doctor, please answer the medical questions based on the patients description..I just had a persantene test and an echo cg. Dr says i am heavily scarred and need a pacemaker by a different name. I am reading about food and herb remedies for dilating veins and lowering bp. I am now taking lopressor and lisinopril plus diuretic. When uncomfortable I take dark chocalate which relieves me well.  <response>: 1. Using magnetic resonance imaging MRI scans of the heart wall, researchers at Johns Hopkins have found that people whose muscle wall thickness contained more than 25 percent scar tissue were approximately nine times more likely to suffer from ventricular arrhythmia andor arrhythmia related sudden death. reason for pacemaker-heart defibrillator2. You may read or use alternative methods but remain under cardiac supervision and follow up regularly with baseline investigations. 