利用心电机制判断室性早搏的良恶性,临床已作了大量的研究。但从早搏后心肌收缩性能的改变探讨早搏的鉴别诊断至今研究甚少。本文根据早搏后强化作用的正变力性机制(即早搏后的强心作用),对紧接早搏前后的窦性心搏的心缩间期主要参数作对比分析,以探索早搏的临床鉴别诊断。对象和方法一、对象 (一)非器质性心脏病组:共40例,男18例,女22例,年龄17～56岁,经临床和实验室检查无心血管系统疾病,但有偶发“室早”,“二联律”形式的早搏除外,因除了早搏后被 The use of ECG to determine the prognosis of premature ventricular premature beats, a large number of clinical studies have been made. However, the research on the differential diagnosis of premature beats has not been done until now. Based on the positive force mechanism of preconditioning and strengthening (ie, cardiac function after premature beat), this paper compares and analyzes the main parameters of cardiac systolic phase before and after premature beat to explore the clinical differential diagnosis of premature beat. Subjects and methods First, the object (a) non-organic heart disease group: a total of 40 cases, 18 males and 22 females, aged 17 to 56 years old, clinical and laboratory tests without cardiovascular disease, but sporadic “ Room early ”,“ second law ”except in the form of premature beats, except after the premature beats