Smartwatch displaying a reading of 92 beats per minute A<unk>  <unk>  is a personal<unk> ing device that allows one to measure/display<unk> <unk>  in real time or record the<unk> <unk>  for later study. It is largely used to gather<unk> <unk>  data while performing various types of physical exercise. Measuring electrical<unk>  information is referred to as Electrocardiography (ECG or EKG). Medical<unk> ing used in hospitals is usually wired and usually multiple sensors are used. Portable medical units are referred to as a Holter<unk> . Consumer<unk> s are designed for everyday use and do not use wires to connect.
Heart rate monitor
Holter monitor
Vectorcardiography
Electrocardiography
Electrical cardiometry
Cardiotocography
AutoPulse
Sphygmograph