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Bookmark or Share- Tachycardia - Symptoms and causes - Mayo ClinicJeff Olsen: This is a normal heartbeat. [HEART BEATING] Atrial fibrillation interrupts this regular beat. Fred Kusumoto, M.D., Cardiology, Mayo Clinic: In atrial fibrillation, instead of the atria squeezing in a normal regular fashion, the atria beat irregularly and chaotically. Jeff Olsen: Dr. Fred Kusumoto is an electrophysiologist at Mayo ...
- Heart rate: What's normal? - Mayo ClinicA normal resting heart rate for adults ranges from 60 to 100 beats per minute. Generally, a lower heart rate at rest implies more efficient heart function and better cardiovascular fitness. For example, a well-trained athlete might have a normal resting heart rate closer to 40 beats per minute.
- Electrocardiogram (ECG or EKG) - Mayo ClinicA healthcare professional looks for heart signal patterns in the electrocardiogram results. Doing this gives information about the heart's health such as: Heart rate. The heart rate is the number of times the heart beats a minute. You can measure your heart rate by checking your pulse.
- Pacemaker - Mayo ClinicThe heart's electrical system typically controls the heartbeat. Electrical signals, called impulses, move through the heart chambers. They tell the heart when to beat. Changes in heart signaling may happen if the heart muscle is damaged. Heart signaling problems also may be caused by changes in genes before birth or by using certain medicines.
- Heart disease - Symptoms and causes - Mayo ClinicHeart failure. This is one of the most common complications of heart disease. The heart can't pump enough blood to meet the body's needs. Heart attack. A heart attack can happen if a piece of plaque in an artery or a blood clot moves to the heart. Stroke. The risk factors that lead to heart disease also can lead to an ischemic stroke.
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