My daughter is now 2 years, almost 4 months. Had a history of VSD, ASD and CHF, all of which have resolved (closed on it's own, no surgery). Her last check up at 17 months said that "heart action was quiet, normal first and second heart sound, and a vibratory systolic murmur heard at the left lower sternal border." He felt at that time (no echo done) that her VSD was completely closed, and her murmur was a common, innocent murmur.
At that time I brought up to him the fact that she her heart rate seems to spike quite a bit with activity. At that time he didn't feel it needed to be monitored, however said that if it was continuing in a couple years, that he would order a Holter study.
It's been almost a year since then and we're still finding she's having spells of high rate and pounding. Often even when she's just laying still. Her "normal" resting rate is under 100, however sometimes she'll be laying there and her heart is pounding (you can easily feel it with your hand) and it's fast. The other day she was laying in bed watching a movie and her heart rate was 126, and pounding.
Is this a normal finding in a toddler? Can they have spells of high heart rates? It's certainly not high all the time, it seems to come and go, sometimes you listen and it's fine, other times it's high. She's in good health, is 32" and 25 lbs, and VERY active.
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