Bradycardia, a slower than normal heart rate, can cause the heart to pump too little oxygen-rich blood to the body.
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.
Sick to your stomach? Nausea and vomiting usually pass quickly but sometimes result from long-term or serious conditions.
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
Echocardiogram allows your doctor to see your heart in motion. Here's what you need to know about the test.
An electrocardiogram (ECG or EKG) is a test that provides valuable clues about your heart health. Here's what you need to know about the test.
A stress test is used to diagnose coronary artery disease and heart arrhythmias, as well as guide treatment of heart disorders.
A tilt table test is used to investigate the cause of fainting (syncope).
Feb. 19, 2013
- Syncope. The Merck Manuals: The Merck Manuals for Healthcare Professionals. http://www.merckmanuals.com/professional/cardiovascular_disorders/symptoms_of_cardiovascular_disorders/syncope.html#v1145025. Accessed Jan. 15, 2013.
- Humphries RL, et al., eds. Current Diagnosis & Treatment: Emergency Medicine. 7th ed. New York, N.Y.: The McGraw-Hill Companies; 2011. http://www.accessmedicine.com/content.aspx?aID=55749292. Accessed Jan. 14, 2013.
- Jardine DL. Vasovagal syncope: New physiologic insights. Cardiology Clinics. 2013;31:75.
- Aminoff MJ, et al. Clinical Neurology. 7th ed. New York, N.Y.: The McGraw-Hill Companies; 2009. http://www.accessmedicine.com/resourceTOC.aspx?resourceID=66. Accessed Jan. 14, 2013.
- Angaran P, et al. Syncope. Neurology Clinics. 2011;29:903.