van Wezel-Meijler G, van Genderingen H R, Meijler F L
Afd. Neonatologie, Academisch Ziekenhuis Vrije Universiteit, Amsterdam.
Ned Tijdschr Geneeskd. 1997 Feb 1;141(5):244-7.
To determine the atrioventricular (AV) conduction time in prematurely born infants as part of a comparative electrocardiological study of conduction times versus heart size.
Recording and analysis of electrocardiograms.
Department of Neonatology, University Hospital of the Free University of Amsterdam, the Netherlands.
Using bipolar precordial leads of standard monitoring equipment in 28 babies, born at a gestational age of 26-36 weeks, ECGs were recorded as soon after birth as possible. The ECGs were analysed and relevant conduction times, such as PR intervals and QRS durations, were measured by hand. These data were related to the birth weights of the infants. (The heart weight amounts to approximately 0.6% of body weight.)
Average birth weight of the babies was 1374 g (SD: 491), average PR interval 93 ms (9), QRS duration 40 ms (4), and average heart rate 148/min (14).
Human hearts weighing 6-10 g have conduction times half that of the adult human heart which weighs 50 times as much. The contribution of the AV node to the total AV conduction time increases with diminishing heart size.
作为一项关于传导时间与心脏大小的对比性心电学研究的一部分，测定早产儿的房室传导时间。
心电图记录与分析。
荷兰阿姆斯特丹自由大学大学医院新生儿科。
对28名胎龄为26 - 36周的婴儿，使用标准监测设备的双极胸前导联，尽可能在出生后立即记录心电图。对心电图进行分析，并用手工测量PR间期和QRS时限等相关传导时间。这些数据与婴儿的出生体重相关。（心脏重量约占体重的0.6%。）
婴儿的平均出生体重为1374克（标准差：491），平均PR间期93毫秒（9），QRS时限40毫秒（4），平均心率148次/分钟（14）。
重6 - 10克的人类心脏的传导时间是重其50倍的成人心脏传导时间的一半。房室结对总房室传导时间的贡献随心脏大小减小而增加。
