Results of 24 hour ambulatory monitoring of electrocardiogram in 131 healthy XXXX aged 10 to 13 years.

@entity1 @entity1605 @entity1165 @entity713 @entity13610 @entity616
Ambulatory monitoring of the electrocardiogram was performed in 131 healthy @entity1 aged between 10 and 13 years for two consecutive periods of 24 hours. When awake the maximal heart rates ranged from 100 to 200 and the minimal from 45 to 80 beats per minute. During sleep maximal rates were 60 to 110 beats and minimal rates 30 to 70 beats per minute. @entity13610 was seen in every @entity1 and in 36 (27.5%) no other changes were found. @entity616 , Mobitz type I, was not seen. @entity616 , Mobitz @entity1605 , occurred twice only. Complete @entity616 occurred in 8.4 per cent, never lasted more than one cycle, and was always followed by a junctional beat. First degree @entity713 occurred in 8.4 per cent and Mobitz type I @entity713 in 10.7 per cent. Premature beats were always single, atrial in 13 per cent, ventricular in 26 per cent, and except in two @entity1 were never more than four in 24 hours. There were no episodes of @entity1165 . Changes in P wave morphology were common and slow junctional rhythm occurred in 13 per cent during sleep.
