Heart disease, usually thought of as blockages in the arteries that can cause a heart attack, can describe any medical condition affecting your heart.
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.
Myocarditis is a disease in which the heart muscle becomes inflamed and swollen, often as the result of an infection.
Pituitary tumors are abnormal growths in the pituitary gland in the brain. Most are noncancerous (benign). Some may cause overproduction of hormones and associated problems.
Enlarged heart is often a sign of a serious heart condition. Find out causes and treatments for enlarged heart.
Mitral valve prolapse occurs when the valve separating two of your heart's chambers malfunctions. The disorder usually isn't serious and often doesn't require surgical treatment.
Coping and support
Fatigue can signal many things. Here are some tips to help you decipher why you're wiped out and to regain your energy.
Shortness of breath can be frightening. Most of the time, a heart or lung condition is the cause.
Foot pain? Headache? Sore throat? Skin rash? Use the Symptom Checker to find out what's causing your symptom.
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.
Tests and diagnosis
Treatments and drugs
Coronary bypass surgery is a procedure to treat blockage of blood to the heart muscle.
A pacemaker can correct a heartbeat that's too slow. Find out the risks, results and recovery time of the procedure to implant a pacemaker.
July 31, 2014
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- What is an arrhythmia? National Heart, Lung, and Blood Institute. http://www.nhlbi.nih.gov/health/health-topics/topics/arr/. Accessed May 8, 2014.
- Heart diseases and disorders. Heart Rhythm Society. http://www.hrsonline.org/Patient-Resources/Heart-Diseases-Disorders#a. May 8, 2014.
- Hands-only CPR: Learn more. American Heart Association. http://www.heart.org/HEARTORG/CPRAndECC/HandsOnlyCPR/LearnMore/Learn-More_UCM_440810_FAQ.jsp. Accessed May 8, 2014.
- Substances and heart rhythm disorders. Heart Rhythm Society. http://www.hrsonline.org/Patient-Resources/Substances-Heart-Rhythm-Disorders#axzz32CJfvIYA. Accessed May 19, 2014.
- Your heart's electrical system. National Heart, Lung, and Blood Institute. http://www.nhlbi.nih.gov/health/health-topics/topics/hhw/electrical.html. Accessed May 1, 2014.
- Goldman L, et al. Goldman's Cecil Medicine. 24th ed. Philadelphia, Pa.: Saunders Elsevier; 2012. http://www.clinicalkey.com. Accessed May 8, 2014.
- Longo DL, et al. Harrison's Online. 18th ed. New York, N.Y.: The McGraw-Hill Companies; 2012. http://www.accessmedicine.com/resourceTOC.aspx?resourceID=4. Accessed May 19, 2014.
- Understand your risk for arrhythmia. American Heart Association. http://www.heart.org/HEARTORG/Conditions/Arrhythmia/UnderstandYourRiskforArrhythmia/Understand-Your-Risk-for-Arrhythmia_UCM_002024_Article.jsp. Accessed May 8, 2014.
- What is cardioversion? National Heart, Lung, and Blood Institute. http://www.nhlbi.nih.gov/health/health-topics/topics/crv/. Accessed May 19, 2014.
- What is catheter ablation? National Heart, Lung, and Blood Institute. http://www.nhlbi.nih.gov/health/health-topics/topics/ablation/. Accessed May 8, 2014.
- What is an implantable cardioverter defibrillator? National Heart, Lung, and Blood Institute. http://www.nhlbi.nih.gov/health/health-topics/topics/icd/. Accessed May 19, 2014.
- Prevention & treatment of arrhythmia. American Heart Association. http://www.heart.org/HEARTORG/Conditions/Arrhythmia/PreventionTreatmentofArrhythmia/Prevention-Treatment-of-Arrhythmia_UCM_002026_Article.jsp. Accessed May 19, 2014.
- Brenyo A, et al. Review of complementary and alternative medicine medical treatment of arrhythmias. The American Journal of Cardiology. 2014;113:897.
- Riggin EA. Decision Support System. Mayo Clinic, Rochester, Minn. May 1, 2014.
- Mankad R (expert opinion). Mayo Clinic, Rochester, Minn. June 6, 2014.