It is a useful test to detect the origin of problem in patients having complaints with exercise.

Rhythm Holter: It is a diagnosis method to record heart rate for 24 hours in order to catch palpitation attacks especially in children with complaints of palpitation attacks albeit with normal heart rates during examination. Upon catching palpitation attack, it helps to determine the treatment method depending on the type of palpitation. Rhythm holter and effort tests also have an important role in determination of future life threatening events in children with a history of open cardiac surgery.