Study of STI Change Characteristics of Different Groups during Exhaustive Load Process with Vibration and Friction

STI (Systolic Time Interval) is one of the methods of non-invasive determination of cardiac function, which applies ECG, PCG and central artery putsation to synchronize photographic record and determine STI indicators. STI is both consistent both with cardiovascular angiography examination results, but also well related to directly measured hemodynamic parameters, which has laid a foundation of theory and practice for the wide application of STI. This thesis gives a regular summary and research analysis of the STI change characteristics of different groups.