【摘要】 本实验同步记录心电图、心音图、心尖搏动图和颈动脉搏动图,测定了202名正常儿童（2.5～14岁）的心缩间期（STI）,通过多因素逐步回归相关分析,探讨了心率、年龄及性别与儿童STI的相关性。QA₂、LVET和TMST与心率呈负相关,与年龄呈正相关,存在显著性别差异。PEP和ICT与年龄呈正相关,心率和性别无影响。PEP/LVET比值和ICT/LVET比值分别为0.316±0.044和0.224±0.034,受心率、年龄影响较小。EMD相对恒定,平均为23.9±4.2毫秒。更多还原

【Abstract】 The STI have been measured in 202 normal （2.5 to 14 years old） from simulta-neous recording of ECG, PCG, ACG and carotidgram. Multifactor progressiveregression analysis was applied to evaluate the STI correlation with heart rate（HR）, age and sex. Electromechanical systolic time （QA₂）, left ventricular ejectiontime （LVET） and total mechanical systolic time （TMST） were remarkably inverselypelated to HR and directly to age. There were significant sex differences in theseintervals. Pre-ejection period （PEP） and isometric contraction time （ICT） werefoundto be prolonged with increasing age but not varied with HR and sex. PEP/LVET ratio（0.316±0.004） and ICT/LVET ratio （0.224±0.034） were little affected by HR, age andsex. Electromechanical delay （EMD） was found to be comparative constant（23.9±4.2）.更多还原