The heart beats in response to electrical signals from the heart's natural pacemaker (sinus node), normally about 60 to 100 beats per minute in a steady rhythm. Abnormal electrical signals can cause a heart rhythm disturbance (arrhythmia). Symptoms include a rapid or irregular heartbeat, palpitations and dizziness. Certain types of arrhythmias can raise the risk of blood clots and strokes.
By showing how electrical impulses move through the heart, electrophysiology studies help physicians to:
For example, tilt table testing determines whether an abnormal nervous system reflex, which controls heart rate and blood pressure, is responsible for lightheadedness, dizziness, or passing out.
Treating Heart Arrhythmia
Crozer-Keystone specialists perform the following procedures to treat heart rhythm disorders in patients: