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患者男性,21岁,因体检发现心律不齐而就诊。平素体健,无阵发性心动过速史。体检:心肺正常,心脏 X 线片、超声心动图及实验室检查均无异常发现。附图为Ⅱ导联连续记录,示P 波直立,频率97—103次/min,QRS 波室上性,ST-T 无改变。但 P-R 间期呈长短2种类型。P_1-R 至 P_7-R 及 P_(20)-R 和 P_(21)-R 为短 P-R 间期;P_8-R 至 P_(18)-R 为长 P-R 间期。从短 P-R 间期突然转变为长 P-R 间期,尔后长 P-R 间期又突然缩短为短 P-R 间期,两者 P-R 间期相差显著,且为突然转换故可诊断为房室结双径路。短 P-R 间期为快径路;而长 P-R 间期为慢径路下传。
Male patient, 21 years old, because of physical examination found arrhythmia and treatment. Usually physical health, no paroxysmal tachycardia history. Physical examination: normal cardiorespiratory, cardiac X-ray, echocardiography and laboratory tests were no abnormal findings. The figure for the II lead continuous recording, showing P wave upright, frequency 97-103 times / min, QRS wave chamber on the sex, ST-T no change. However, P-R interval was two types of length. P_1-R to P_7-R and P_ (20) -R and P_ (21) -R are short P-R intervals; P_8-R to P_ (18) -R are long P-R intervals. From a short P-R period to a long P-R period, then the long P-R interval suddenly shortened to a short P-R interval. The difference between the two P-R intervals was significant. Short P-R interval for the fast track; and long P-R interval for the slow track downlink.