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患者,男性,35岁。因心悸、胸闷1周就诊。体查:血压15.5/10.4kPa。心界不扩大,心音正常,无病理性杂音,坐位时心律齐,卧位时律不齐。肺部无异常发现。X线胸片示心肺正常。二维超声心动图正常。心电图平卧位常规描记12个导联后,附图A行是卧位时连续描记Ⅱ导联,窦性P波,P-P间期长短不等,短P-P和长P-P有规律出现,前者0.82～0.88秒,后者1.16～1.20秒。2个短P-P和一个长P-P为一个周期,每个短长周期是0.70～0.74秒的4倍,符合等传间期整倍律,为4:3非典型文氏周期。心电图诊断为Ⅱ度非典型文氏型窦房阻滞呈4:3传导。B行是坐位时连续记录Ⅱ导联,窦性P波有规律发生,P-P间期固定在0.66～0.70
Patient, male, 35 years old. Due to heart palpitations, chest tightness 1 week treatment. Physical examination: blood pressure 15.5 / 10.4kPa. Heart does not expand, normal heart sounds, no pathological murmur, rhythm when sitting Qi, supine when the law is missing. No abnormal lungs found. X-ray showed normal heart and lung. Two-dimensional echocardiography normal. Electrocardiogram supine position tracing conventional 12 lead, the line in Figure A is a continuous record when lying II lead, sinus P wave, PP interval ranging from short PP and long PP regularly occur, the former 0.82 ~ 0.88 seconds, the latter 1.16 ~ 1.20 seconds. Two short P-P and one long P-P are one cycle, each short cycle is four times of 0.70 ~ 0.74 second, which is equal to the law of equal transmission interval and is 4: 3 atypical Venturi cycle. Electrocardiogram diagnosis of Ⅱ degree atypical Venturi sinoatrial block was 4: 3 conduction. B line is sitting while recording Ⅱ leads, sinus P wave occurs regularly, P-P interval fixed at 0.66 ~ 0.70