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患者 男,48岁。胸闷、阵发性心前区痛半年,加重两月于1993年2月18日就诊。既往无冠心病,高血压史。体检:血压17.1/10kPa(128/75mmHg)。心界不大,心律规整,无杂音,行次极量踏车运动试验。采用国产EGM-Ⅱ心脏动量机,额定功率300～2100kgm/min,300kgm/min为一档递增,额定转速60转/min以上,观察导联CH_5(正极置于V_5,负极置于前额)。运动前描记的常规12导联心电图显示:窦性节律,心率68次/min,P-R间期0.17s,Q-T间期=0.38s,ST段无明显偏移,T_1低平,T_(aVL)倒置,T_(V4、V5)正负双向,u波不明显,R_(V4.V5)高度均为18.5mm,S_(V4)深度为10mm。当运动功率在300kgm/min、2分钟
Male patient, 48 years old. Chest tightness, paroxysmal supraventricular pain six months, two months in February 1993 on the 18th visit. No previous coronary heart disease, history of hypertension. Physical examination: blood pressure 17.1 / 10kPa (128 / 75mmHg). Little heart, regular heart rhythm, no noise, the most extreme treadmill exercise test. Using domestic EGM-Ⅱ cardiac momentum machine, the rated power of 300 ~ 2100kgm / min, 300kgm / min as a file increment, rated speed of 60 rev / min or more, observe the lead CH_5 (positive at V_5, negative placed in the forehead). The conventional 12-lead electrocardiogram before exercise showed sinus rhythm, heart rate 68 beats / min, PR interval 0.17s, QT interval 0.38s, no significant deviation in ST segment, T_1 low level and T aVL inversion , T_ (V4, V5) positive and negative bidirectional, u wave is not obvious, R_ (V4.V5) height are 18.5mm, S_ (V4) depth of 10mm. When the exercise power at 300kgm / min, 2 minutes