A 37-year-old member asked:
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what risks are attributed to untreated bradycardia or tachycardia?

3 doctor answers
Dr. Mary Callahan
28 years experience Cardiology
Tachy or Brady: Aside from not feeling well with either of these, there is a likelihood that either can cause a cardiomyopathy or a weakness in the muscle. These rhythms can also cause a loss of consciousness or syncope. So, these arrhythmias should be treated and followed regularly.
Answered on Aug 12, 2014
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Dr. Michael Mascia
48 years experience Critical Care
Pump Failure: Heart rate & rhythm combine to determine cardiac output, or, in common terms, the pumping ability of the heart. Good cardiac function & pumping ability in a normal heart can decrease with slow or fast heart rates. Usually, low rates protect the heart, but limit cardiac output = exercise tolerance is decreased. Sustained high rates = heart damage & heart failure. Sick heart? All bets are off. Dr. M.
Answered on Jun 24, 2012
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Dr. Nancy Mellow
43 years experience Internal Medicine
It depends: In some cases, these can be normal states (an athletic person with bradycardia) or due to another condition (tachycardia with overactive thyroid, too much alcohol, or anemia) that needs to be treated. Otherwise, either can cause dizziness or fainting, fatigue, and inadequate blood flow (which can cause heart damage or even a stroke). The safest approach is treatment.
Answered on Sep 26, 2013

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A 28-year-old member asked:
Dr. Francis Uricchio
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Depends: The risk of bradycardia is typically dizziness or passing out. On occasion, bradycardia can chest pain or heart failure. Tachycardia can chest pain, ... Read More
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A 48-year-old member asked:
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Heart Rate: Tachycardia is a heart rate greater than 100 beats per minute. Bradycardia is a heart rate less than 60 beats per minute.
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A 46-year-old member asked:
Dr. Alisa Niksch
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More data needed...: I would be interested to know what the actual heart rates were when you stood. It would also be important to know if you had a blood pressure change w ... Read More
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