I have never heard of anyone having a heart attack due to abruptly stopping benzodiazepines either. I do agree that palpitations are common. I also do not pay any attention to info put out by rehab or detox centers for benzo withdrawal. They want peoples money, they fear monger, they don’t taper properly, one couldn’t afford to stay there long enough to do a proper taper. Can you provide a source other than a detox center.