About Tachycardia (Fast Heartbeat)
If you have tachycardia, your heart beats very fast, at least more than 100 beats per minute. This can cause dizziness, lightheadedness, or a fluttering in the chest. An implantable cardioverter defibrillator continuously monitors your heart and delivers life-saving therapies to treat dangerously fast heart rhythms.
Tachycardia is a fast heart rate (more than 100 beats per minute) that starts in the heart's lower chambers (ventricles). At these elevated rates, the heart is not able to efficiently pump oxygen-rich blood to your body.
Tachycardia can occur in either the upper heart chambers (atrial tachycardia) or lower heart chambers (ventricular tachycardia).
Causes of tachycardia include:
- Heart-related conditions such as high blood pressure (hypertension)
- Poor blood supply to the heart muscle due to coronary artery disease (atherosclerosis), heart valve disease, heart failure, heart muscle disease (cardiomyopathy), tumors, or infections
- Other medical conditions such as thyroid disease, certain lung diseases, electrolyte imbalance, and alcohol or drug abuse
- Emotional stress or drinking large amounts of alcoholic or caffeinated beverages
Symptoms of tachycardia include:
- Shortness of breath
- Sudden weakness
- Fluttering in the chest
Certain conditions can increase your risk of developing tachycardia:
- Coronary artery disease (atherosclerosis)
- Heart failure (poor pumping heart)
- Heart attack (myocardial infarction)
- Congenital heart defects (condition you are born with)
- Inflammatory or degenerative heart conditions
- Chronic lung disease
Information on this site should not be used as a substitute for talking with your doctor. Always talk with your doctor about diagnosis and treatment information.
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