Dickinson D F, Scott O
Br Heart J. 1984 Feb;51(2):179-83. doi: 10.1136/hrt.51.2.179.
Ambulatory monitoring of the electrocardiogram in 100 healthy 14 to 16 year old boys showed heart rates ranging from 45 to 200 beats/minute during the day and from 23 to 95 beats/minute during sleep. Sinus arrhythmia was present in all cases and was the only variation noted in 17%. Sudden variations in the PP interval occurred in 41%, but a precise diagnosis of the mechanism was usually impossible; 15% had changes compatible with sinus arrest or temporary complete sinoatrial block, and one boy had a pattern compatible with type II second degree sinoatrial block. Escape rhythms were noted in 26%, first degree atrioventricular block in 12%, and second degree atrioventricular block (Mobitz type I) in 11%. Mobitz type II second degree atrioventricular block was seen on one occasion in one boy. Ventricular extrasystoles seen in 41% were of uniform morphology in 75% and multiform in 25%. Short episodes of ventricular tachycardia were recorded in 3%.
对100名14至16岁健康男孩进行的动态心电图监测显示，白天心率范围为45至200次/分钟，睡眠期间为23至95次/分钟。所有病例均存在窦性心律不齐，17%的病例中窦性心律不齐是唯一的变化。41%的病例出现PP间期突然变化，但通常无法对其机制进行精确诊断；15%的病例变化符合窦性停搏或暂时性完全性窦房阻滞，1名男孩的心电图模式符合II型二度窦房阻滞。26%的病例出现逸搏心律，12%的病例出现一度房室传导阻滞，11%的病例出现二度房室传导阻滞（莫氏I型）。1名男孩曾有1次出现莫氏II型二度房室传导阻滞。41%的病例出现室性期前收缩，其中75%形态单一，25%形态多样。3%的病例记录到短阵室性心动过速。
