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A member asked:

What causes a rapid heartbeat even when i'm feeling relaxed?

11 doctors weighed in across 3 answers
Dr. Louis Grenzer answered

Specializes in Cardiology

Several things: Being not relaxed is just one of many things that affects heart rate and rhythm. You could have an overactive thyroid for instance. Fever can make you heart beat faster or being dehydrated. Some times the heart rhythm can just become abnormal such as when a person gets atrial fibrillation.

Dr Pizzo and 4 doctors agreed

Answered 9/29/2016

6.2k views

Thank

Tachycardia: Anemia, hyperthyroid, small heart, days autonomic, weak left ventricle, valve disease, aneurysm and more including normal for you.

Dr Koch agreed

Answered 3/30/2013

5.2k views

Thank

Heart rate: Anemia, hyperthyroid, fever, deconditioning, decreased ejection fraction.

Dr Sneid and 2 doctors agreed

Answered 1/20/2014

5.1k views

Thank
Show 1 more comment

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