have taken diltiazemxr 180mg for 20 years, am 54 male 6'0" 195 in shape healthy with 140/90 bp (inherited not dietary), recently have developed heart palpitations - occur every day during the day when sitting or standing, not exercising or lying down, no pain, just skipped beats every 3, 6 or 12 beats continuously throughout the day. Stress echo showed MVP with some leakage. Stopped caffeine (only drank one cup coffee per day anyway) and alcohol but even minor stress starts the cycle of very annoying heart palpitations. Not scared of them, just very uncomfortable. Taking Magnesium but not helping. What should I be doing?