What are the chances of death due to a heart palpitation?

Zero: Simple palpitations are common, but if you have more than five per minute after you reduce your coffee intake, it's worth finding the cause. Runs of abnormal rhythm are quite different from the familiar "skipped beat" though they look similar on ekg; and they can be dangerous. A holter monitor will let you know which is which. Good luck.

Depends: Palpitations are an awareness of the beating of the heart. In some patients, there is no abnormality at all. In others benign premature contractions are found which are also benign. In some, supra ventricular arrhythmias are found which are benign and manageable. However, in some patients more worriesome rhythms are found and require additional work up. Please, see your physician.