My son-in-law - recent had an MI - with a torsade ventricular arrhythmia afterward.  This was 3 months ago.  He saw his doctor today after having had a follow-up MUGA and was told that he has a black spot in his heart - and they are not going to put in the indwelling defibrillator (hes been wearing a life vest) until they investigate.  After 40 years of medical transcription experience - I dont really get what a black (dead) spot is.  My daughter is very concerned.
Welcome to Chat Doctor ...as your son-in-law had recent history of infarct .and his MEGA Scan shows a black spot .means the old infarcted part which is non-functional type thing