PMC9869194_01
The preoperative 12-lead electrocardiogram (ECG) showed sinus rhythm with a rate of 60 bpm and abnormal ST-T segment. There was a slight ST-segment depression in leads V1, V2, and V3.
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The preoperative electrocardiogram (ECG) showed sinus rhythm with an HR of 60 bpm and abnormal ST-T segment (Figure 1).
The results of Holter electrocardiogram (ECG) showed that asystole lasted 17 s.
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Holter ECG showed that asystole lasted 17 s (Figure 2). HRV data analyzed by the Ambulatory ECG System (Shenzhen Biomedical Instruments) were obtained at five timepoints: before anesthesia induction (T1), after tracheal intubation (T2), during foramen ovale puncture (T3), after atropine was administered intravenously (T4), and during ganglion compression (T5) (Table 1).