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1.正确答案本例心电图最终诊断为一度房室阻滞伴间歇性二度房室阻滞;双腔起搏及保护性AAI起搏2.答案情况:因距第五期发刊时间较近,未能充分收到广大读者寄回的答案,使评估困难。3.点评征解图A的PR间期380ms,B图AAI起搏时pAV间期460ms,提示患者持续存在严重的一度房室阻滞。目前,当PR间期>350ms时常诊断PR间期过度延长,其可使左室有效舒张期缩短,心脏舒张功能受损。此外,本例患者还有间歇性二度房室阻滞,使心房起搏时间歇性出现QRS波的脱落(图C、图D)。
1. The correct answer The final diagnosis of ECG in this case was the first diagnosis of atrioventricular block with intermittent second degree atrioventricular block; dual-chamber pacing and protective AAI pacing 2. Answer: Because from the fifth issue of the time close , Failed to fully receive the answers returned by readers, making assessment difficult. 3. Comments Signature map A PR interval 380ms, B chart AAI pacing pacing 460ms, suggesting that patients with persistent severe atrioventricular block. Currently, when the PR interval> 350ms often diagnose excessive prolonged PR interval, which can shorten the effective left ventricular diastolic, impaired diastolic function. In addition, there was intermittent second-degree atrioventricular block in our patient, which left QRS waves intermittently during atrial pacing (Figure C, Panel D).