Does cardiography require fasting?

A cardiographic examination

is an invasive procedure for examining the heart. Fasting for at least 4 hours is required before the examination, and fasting should be started the night before. Diet may affect heart rate and vasoconstriction, which may affect the accuracy of the results. In addition, an ECG, blood routine, liver function test, etc. should be performed before the examination to assess the patient's physical condition and suitability for the examination.

Patients should follow the doctor's instructions to prepare before the examination to ensure that the examination goes smoothly.