Cardiac catheterization is used to record the electrical activity of the heart muscle.

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Cardiac catheterization is a procedure used to diagnose and treat various heart conditions by inserting a catheter into a blood vessel and guiding it to the heart. It is not used to record electrical activity directly, but can provide information about blood flow, pressures within the heart, and images of the heart's anatomy. Electrical activity of the heart can be recorded through other methods such as electrocardiogram (ECG or EKG) and Holter monitor.

Cardiac Catheterization Is Used to Record the Electrical Activity of the Heart