帮忙分析下句子成分Small transmitters broadcasting physiological measu

Small transmitters 是主语
broadcasting physiological measurements to nearby recording machines 作后置定语,这里可以改成which broadcast physiological measurements to nearby recording machines
are used 是谓语
to monitor the exercise of both heart patients and athletes表示目的状语

Small transmitters broadcasting physiological measurements to nearby recording machines are now used to monitor the exercise of both heart patients and athletes.
从small到machines是主语，are used是谓语，一般现在时的被动语态，to monitor到最后是宾语。

Small transmitters broadcasting physiological measurements to nearby recording machines
为主语，其中small为定语，broadcasting...为后置定语；
are now used to monitor the exercise of both heart patients and athletes.
为谓语，其中now为时间状语，to monitor...为目的状语。

are前面的是主语，are used是被动语态作谓语，后面的作状语，说明目的。那些东西被用来监测心脏病人和运动员的身体锻炼。