[Variations of the heart rate during nocturnal sleep in preschool and school children].
D000293:Adolescent; D002648:Child; D004562:Electrocardiography; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D012890:Sleep
Kolebaniia ritma serdechnykh sokrashcheniĭ vo vremia nochnogo sna u deteĭ doshkol'nogo shkol'nogo vozrasta.