患者男性,65岁。心电图为Ⅱ导联连续描记(附图)。P波直立,PP 0.48s,偶有房性早搏(ⅡbP_2);QRS波有两种,一呈高Rs形,一呈较矮RS形(简称高R及矮R),其频率不足窦性频率之半,存在高度房室传导阻滞。高R者与P波无关,发生稍迟,属高位室性逸搏;矮R者与P波密切相关,室性逸搏后第一个矮R之PR间期均为0.16s.隔一个P波后,下一个P波又以较长之PR间期(均为0.26s)下传心室,呈 Male patient, 65 years old. ECG for the second lead continuous tracing (with photos). P wave was upright, PP 0.48s, occasional atrial premature beats (ⅡbP_2); QRS wave there are two, one was a high Rs shape, a shorter RS ​​shape (referred to as high R and short R), the frequency of less than the sinus frequency Half, there is a high degree of atrioventricular block. High R who had nothing to do with the P wave occurred a little later, is a high ventricular escape; short R and P wave are closely related to ventricular escape after the first short R PR interval were 0.16s. P After the wave, the next P wave with a longer PR interval (both 0.26s) downlink ventricle, was