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The medicine cabinet: Ask the Harvard experts: What’s happening when my heart flutters or skips a beat?
Q: I occasionally feel my heart fluttering or skipping a beat. It usually lasts only a few seconds, but sometimes it seems to ...
Premature ventricular contraction (PVC) is a type of abnormal heartbeat, or arrhythmia. It happens when the heartbeat begins in the lower, rather than the upper, heart chambers. This creates an ...
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