Note:  Do not rely on this information. It is very old.

Palpitation

Palpitation, the feeling of distress which is associated with excited action of the heart. In many instances this symptom is occasioned by digestive disturbance. It occurs also as a result of the immodej-ate use of tobacco, in anaemic conditions, and in Graves's disease. It may be due to disturbed action of the heart consequent upon disease primarily affecting that organ.