Masini V, Rocchi M, Santini M
G Ital Cardiol. 1980;10(10):1267-79.
A study by dynamic electrocardiography has been carried out for 24 hours on 100 healthy subjects (50 males and 50 females), of ages included between 20 and 70 years. Recording were carried out during an average working day. Average high, mean and low heart rates have been calculated in the 24 hours, at various times of the day, during mental work, physical effort, sexual activity (20 cases) and sleep. Sinus arrhythmias of various degrees (bradycardia, S-A blocks) have been observed overall in 16% of cases. Incidence was higher in younger subjects (12%) as compared with the older group (4%), and during sleep (75%) as compared to periods of wakefulness (25%). Supraventricular and ventricular arrhythmias hae occurred respectively in 20 and 21% of all subjects. Both types of arrhythmias (S.V. and V.) occurred more frequently in older subjects (34 and 32%) as compared to the younger group (10 and 5%). Supraventricular ectopic beats were more frequent during wakefulness (59.3%) rather than during sleep (40.7%); vice-versa, ventricular ectopic beats have been noticed to appear more frequently during sleep (74.5%), than during wakefulness (25.5%). Overall, arrhythmias have not been common (less than 500 ectopic beats/24 hours and less than 50 ectopic beats/hour), and only rarely they were repetitive. During our study we have observed ST changes or upward deviation, but in all cases a definite pathological significance was missing.
对100名年龄在20至70岁之间的健康受试者（50名男性和50名女性）进行了24小时动态心电图研究。记录在一个平均工作日进行。计算了24小时内、一天中的不同时间、脑力劳动、体力活动、性活动（20例）和睡眠期间的平均心率、最高心率和最低心率。总体上，在16%的病例中观察到不同程度的窦性心律失常（心动过缓、窦房阻滞）。与老年组（4%）相比，年轻受试者（12%）的发生率更高；与清醒期（25%）相比，睡眠期间（75%）的发生率更高。室上性和室性心律失常分别发生在所有受试者中的20%和21%。与年轻组（10%和5%）相比，两种类型的心律失常（室上性和室性）在老年受试者中更频繁发生（34%和32%）。室上性早搏在清醒时（59.3%）比睡眠时（40.7%）更频繁；反之，室性早搏在睡眠时（74.5%）比清醒时（25.5%）更频繁出现。总体而言，心律失常并不常见（每24小时少于500次早搏，每小时少于50次早搏），且很少有重复性。在我们的研究中，我们观察到ST段改变或上抬，但所有病例均无明确的病理意义。
