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What is electrophysiologic testing and mapping?

Dr. Douglas E. Severance, MD
Family Practitioner
Electrophysiologic testing and mapping is a medical test your doctor may order to find the location and cause of an arrhythmia. With electrophysiologic testing, the cardiologist will use thin, flexible tubes (called catheters) that have electrodes on the tips. The catheters are carefully placed in your blood vessels and then threaded to different sites on your heart. When the cardiologist has the catheters in the correct place, the electrodes can map or figure out the electrical impulses in your heart. Using electrophysiologic testing and mapping, your doctor can trigger your heartbeat to cause or even stop an arrhythmia.

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