what are the various reasons for palpitation in the chest?

Answer 1

PALPITATION is known as ARRHYTHMIAS medically-

Common causes of arrhythmias, or conditions that can lead to arrhythmias, include heart disease, high blood pressure, diabetes, smoking, excessive use of alcohol or caffeine, drug abuse, and stress. Over-the-counter medications, prescription medications, dietary supplements and herbal remedies also can cause arrhythmias in some people.

Scarring can result from numerous problems — most commonly, from a previous heart attack — and this scarring may disrupt the initiation or conduction of electrical impulses.

In a healthy person with a normal, healthy heart, it's unlikely for a sustained arrhythmia to develop without some outside trigger, such as an electrical shock or the use of illicit drugs. That's primarily because a healthy person's heart is free from any abnormal conditions, such as an area of scarred tissue.

However, in a heart with some evidence of disease or deformity, the initiation or conduction of the heart's electrical impulses may be destabilized, making arrhythmias more likely to develop.-

Answer 2

Palpitations can be caused by several things--they can be caused from caffeine, smoking, alcohol, stress, decongestants, certain medications. diet aids. I would first eliminate caffeine. A lot of time people drink several cups of coffee or soda per day which can cause it. Even if you have done this for years and did not have trouble it could still be the cause of it now--
If they are occurring frequently you need to see your doctor. If your are having palpitations and they are accompanied by chest pain, sob, profuse sweating, dizziness, nausea and/or vomiting, numbness or tingling in extremities you should seek immediate care at the Emergency Room.