Hyperthyroidism occurs when your thyroid gland produces too much of the hormone thyroxine — speeding up your metabolism and sometimes leading to serious complications.
Long QT syndrome is an electrical disturbance that can cause sudden, rapid heart rates. It can be genetic or a side effect of medication.
Eisenmenger syndrome, a complication of congenital heart defects, can be life-threatening if not properly treated. Find out more.
High blood pressure affecting only the arteries in your lungs is known as pulmonary hypertension. Discover the symptoms, risk factors and treatment for this condition.
Find out about this rare cause of heart attack in young, healthy people.
Sudden cardiac arrest is a medical emergency. Rapid treatment improves your chances of survival.
Lifestyle and home remedies
High stress levels at work can steal the joy from life. Learn how to turn the tables on job stress, starting today.
Heart palpitations are skipped, fluttering or racing heartbeats that aren't usually a symptom of a serious heart problem. Discover the causes and symptoms of this condition.
Shortness of breath can be frightening. Most of the time, a heart or lung condition is the cause.
Tachycardia, a rapid heart rate, is caused by an abnormality in your heart's electrical impulses. Tachycardia can cause serious complications, including sudden cardiac arrest.
Vasovagal syncope (fainting) is a sudden and brief loss of consciousness that occurs when the blood flow to your brain is markedly reduced.
Tests and diagnosis
April 02, 2014
- Zimetbaum PJ. Overview of palpitations in adults. http://www.uptodate.com/home. Accessed Nov. 26, 2013.
- Palpitations. National Heart, Lung, and Blood Institute. http://www.nhlbi.nih.gov/health/dci/Diseases/hpl/hpl_all.html. Accessed Nov. 26, 2013.
- Wexler RK, et al. Outpatient approach to palpitations. American Family Physician. 2011;84:63.