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What could be possible causes for a 4 year old's heart to race then slow down, and repeat the cycle every few seconds when listening with a steth?
1 doctor weighed in

Dr. Steven Hill
Family Medicine
In brief: Most often normal
Most often this is a benign condition where the heart rate varies with respiration - speeding up with inspiration and slowing with exhalation.
This is usually called a sinus arrhythmia and tends to go away as we age. If you are concerned have your child checked by his doctor for reassurance.

In brief: Most often normal
Most often this is a benign condition where the heart rate varies with respiration - speeding up with inspiration and slowing with exhalation.
This is usually called a sinus arrhythmia and tends to go away as we age. If you are concerned have your child checked by his doctor for reassurance.
Dr. Steven Hill
Dr. Steven Hill
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