Just imagine that a child can play, go out to the park, take a rest or have some medicine taken, and at the same time, the sensors on their chest read and record the heart activity. The data is sent via Bluetooth (or copied to a memory card) to a computer program. The doctor has access to the program and analyses the data.
This research is called the Holter test. It can trace the connection between the child's complaints, life events, use of medication and the heart condition. It also helps to detect a health problem at an early stage.