When are heart palpitations a concern?
D001145:Arrhythmias, Cardiac / Q000209:etiology* / Q000503:physiopathology / Q000517:prevention & control; D003937:Diagnosis, Differential; D015444:Exercise; D006801:Humans; D010809:Physical Fitness; D012064:Relaxation Therapy; D012307:Risk Factors; D013312:Stress, Physiological