Compared to DDD mode, adopting DDDR and VVIR pacing modes, cardiovascular symptoms and quality of life of 51 SSS patients were significantly improved.

病窦综合征病人，与DDD模式相比，DDDR、VVIR起搏模式时，心血管症状和生活质量显著改善；

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Objective: To observe the clinical effect and evaluate the exercise tolerance in sick sinus symptom patients with angina pectoris after implanting rate responsive pacemaker (DDDR).

目的：观察合并冠心病心绞痛的病态窦房结综合征患者置入频率应答起搏器（DDDR）的临床疗效及运动耐量评价。

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Methods Pacing parameters and working modes of digital pacemaker were evaluated in 25 cases (23 cases with DDDR pacemakers, 2 cases with SSI pacemakers) and compared to that of analog pacemaker.

方法观察25例植入数字式起博器(DDDR型23例，SS I型2例)的起搏参数与工作方式，并与通常的模拟式起搏器进行比较分析。

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