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心脏收缩时间间期(STI)是无创性定量评价左心室收缩功能和甲状腺功能的一种较灵敏的指标。本文目的系对16~20岁年龄组的正常青年进行STI的多因子逐步回归分析,综合考虑心率、年龄、性别等因素对STI的影响以建立—比
Systolic time interval (STI) is a non-invasive quantitative evaluation of left ventricular systolic function and thyroid function of a more sensitive indicator. The aim of this paper is to conduct a stepwise regression analysis of STI in normal youth aged 16 to 20 years, and to consider the influence of heart rate, age and gender on STI so as to establish a ratio