well its probably scared or something is frightening it, or this could happen after a long flight like humans (running).
When the heart beats too fast, blood no longer circulates effectively in the body.
The heart beats as fast as 200times per sec during excercise.
Answer by FutureLPGAgolferHow fast your heart beats. (If your heart beats fast then blood would be rushing through your body quick.)
Is when your heart beats fast!
The heart rate of baby is about 90 beats per minute.
Heart rate is the number of beats per minute. A heart 'races' if it beats too fast.
your heart...
220bpm - your age
A hamsters heart beats close to 450 beats per minute.
"My heart beats so fast for you!" in French would be "Mon cœur bat tellement vite pour toi!"
A harder or faster pulse.
A cat's heart beats twice as fast as a human heart, at 110 to 140 beats per minute.