CPT® Code 93025

Microvolt T-wave alternans testing is a specialized diagnostic procedure utilized to evaluate patients who may be at an increased risk for sudden cardiac arrest. This risk can stem from various underlying conditions, including a history of heart attack, heart failure, left ventricular dysfunction, unexplained syncope (loss of consciousness), or a family history of sudden cardiac arrest. The procedure involves the placement of a total of 14 electrodes on the patient's torso, which are connected to an electrocardiogram (ECG) machine. Among these electrodes, seven are standard ECG electrodes, while the remaining seven are specifically designed microvolt T-wave alternans sensors. These sensors are capable of detecting minute fluctuations in the T-wave segment of the ECG, which are often imperceptible to the naked eye. During the test, the patient typically walks on a treadmill, with the speed gradually increased to elevate the heart rate. Alternatively, the heart rate can be augmented through pharmacological means or by using a pacemaker. The testing continues until either significant T-wave changes are observed or the patient reaches the target heart rate without any detectable T-wave alterations. Following the procedure, the physician analyzes the ECG data and compiles a comprehensive interpretation of the findings, which is documented in a written report.