Your heart beats about 100,000 times a day. Sometimes it beats faster and sometimes more slowly, depending on what you're doing and whether, for instance, you're all worked up about something. So ...
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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 last longer. It’s uncomfortable, but otherwise I feel OK. What causes this ...
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