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心率依赖性传导阻滞已引起临床关注。而与心率有关的激动起源异常则少见报道,现介绍2例与心率有依赖关系的室性早搏(室早)。临床及心电图资料例1 患者女性,34岁,因阵发性室上性心动过速反复发作四年,于1977年4月25日入院。查体:P74次/min,Bp17.29/10.64kPa(130/80mmHg)。心、肺阴性。心电图、超声心动图、心脏三位片、血沉、甘油三酯、胆固醇等均在正常范围。经食管心房调搏检查示房室结内双径路。并于S_1-S_1递增心房调搏中诱发室早(呈左束支阻滞型),具以下特点:(1)随S_1-S_1间期缩短,室早遂诱发,且频度渐增,直至呈三联律;(2)随S_1-S_1间期缩短,联律间期稍延长,详见表1和图1。
Heart rate-dependent block has drawn clinical attention. The heart rate-related excitatory anomalies are rarely reported, and 2 cases of premature ventricular contractions with ventricular arrhythmias (ventricular premature) are now described. Clinical and electrocardiographic data Example 1 Female patient, 34 years old, who had recurrent paroxysmal supraventricular tachycardia for four years and was admitted on April 25, 1977. Physical examination: P74 times / min, Bp17.29/10.64 kPa (130/80 mmHg). Heart, lung-negative. Electrocardiogram, echocardiography, heart three films, ESR, triglycerides, cholesterol, etc. are in the normal range. Trans-esophageal atrial pacing test showed atrioventricular node pathways. (P <0.05), which was induced by S_1-S_1 increased atrial pacing in the early stage (with left bundle branch block type), with the following characteristics: (1) As the S_1-S_1 interval shortened, ventricular asymptomatic evoked, (3) As the S_1-S_1 interval shortened, the duration of the joint law was slightly prolonged. See Table 1 and Figure 1 for details.