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首页> 外文期刊>Circulation journal >J waves in accidental hypothermia - Body temperature and its clinical implications -
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J waves in accidental hypothermia - Body temperature and its clinical implications -

机译：意外体温过低的J波-体温及其临床意义-

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Background: The J wave is an ECG marker of ventricular fibrillation. However, the prevalence and clinical implications of J waves in hypothermic patients remain unclear. Methods and Results: We evaluated the clinical characteristics and ECGs of patients who were admitted for accidental hypothermia (<35.0°C). J waves were defined as notches or slurs in the terminal part of the QRS complex with an amplitude ≥0.1 mV. We analyzed the prevalence of J waves and the relationship between body temperature (BT) and J wave amplitude. We also examined the augmentation of J waves following variable R-R intervals in patients with atrial fibrillation. Furthermore, we assessed the incidence of ventricular arrhythmias. A total of 60 hypothermic patients were recruited (mean age, 64±9 years; 97% male). The mean BT was 31.3°C (range, 29.4-33.5°C). J waves, which disappeared after rewarming, were observed in 30 patients (50%), with a higher frequency in patients with lower BT. Higher amplitude of J waves was associated with lower BT (P<0.001). Of the 8 patients with J waves and atrial fibrillation, 4 exhibited an augmentation of J waves following a short R-R interval. Only 1 patient with J waves developed ventricular tachycardia during rewarming. Conclusions: The prevalence of J waves and their amplitude increased with the severity of hypothermia. The temporal development of J waves might not be associated with fatal arrhythmic events.
机译：背景：J波是心室颤动的心电图标志。然而，对于体温过低的患者，J波的患病率和临床意义尚不清楚。方法和结果：我们评估了因意外体温过低（<35.0°C）而入院的患者的临床特征和心电图。 J波被定义为QRS复合波的末端部分中的凹口或浆液，振幅≥0.1mV。我们分析了J波的患病率以及体温（BT）和J波振幅之间的关系。我们还研究了房颤患者在可变的R-R间隔后J波的增强。此外，我们评估了室性心律失常的发生率。总共招募了60位体温过低的患者（平均年龄64±9岁;男性97％）。平均BT为31.3°C（范围29.4-33.5°C）。在30例患者（50％）中观察到J波在变温后消失了，在BT较低的患者中出现频率更高。 J波的幅度越大，BT越低（P <0.001）。在8例J波伴房颤的患者中，有4例在短R-R间隔后表现出J波增强。在复温过程中，只有1例J波患者出现室性心动过速。结论：J波的发生率及其幅度随着体温的降低而增加。 J波的暂时发展可能与致命的心律失常事件无关。

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