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患者男性,59岁,主诉劳累后心前区不适五年。查体:血压15.96/10.64kPa(120/80mmHg),心率68次/min,律齐,无杂音,胸片示心胸比率0.53,静息心电图正常,24小时动态心电图见偶发室性早搏,活动平板负荷试验可疑阳性。为进一步明确诊断,于早餐后2小时行食道心房起搏心脏负荷检查。采用国产8号起搏导管和苏州产XC-I型心脏多功能刺激仪,导管尖端距鼻孔37cm,起搏电压28V,脉宽10 ms。当起搏频率达130次/min,持续30s时,患者觉头
Male patient, 59 years old, complained of precordial discomfort for five years after exertion. Physical examination: blood pressure 15.96 / 10.64kPa (120 / 80mmHg), heart rate 68 beats / min, law Qi, no noise, chest X-ray ratio of 0.53, resting ECG normal, 24 hours dynamic electrocardiogram see occasional premature ventricular contractions, Load test suspicious positive. To further confirm the diagnosis of esophageal atrial pacing cardiac load 2 hours after breakfast. Domestic pacing catheter 8 and Suzhou production XC-I heart multifunction stimulator, catheter tip 37cm away from the nostril, pacing voltage 28V, pulse width 10 ms. When the pacing rate of 130 times / min, sustained 30s, the patient head