患者男,19岁,因甲亢合并低血钾周期性麻痹来院。血钾1.5mmol/L,心电图示,P波规则出现,频率168次/min,呈2:1下传心室,偶可见到连续两个P波下传心室,P—R时间0.26s,室上性R波呈窄的Rs型;呈联律间期短的室性早搏,单个出现,呈联律间期长的室性早搏,成对出现或四个联发,图2.P波仍规则出 Male patient, 19 years old, due to hyperthyroidism with hypokalemia periodic paralysis to the hospital. Potassium 1.5mmol / L, ECG, P wave rules appear, the frequency of 168 times / min, was 2: 1 downlink ventricle, even seen two consecutive P wave downlink ventricle, P-R time 0.26s, R wave was a narrow Rs type; was a short period of ventricular premature ventricular contractions, a single appearance was associated with long ventricular premature ventricular contractions, in pairs or four co-occurrence, Figure 2. P waves are still rules Out