© Copyright 2026 American Medical Association. All rights reserved.
Interrogation of an implantable subcutaneous lead defibrillator system involves a comprehensive evaluation performed during a patient encounter with a cardiac electrophysiologist. This procedure is crucial for assessing the functionality of the defibrillator, particularly when patients present with symptoms that may indicate device malfunction or alterations in cardiac function. During the in-person interrogation, the patient is connected to an electrocardiogram (ECG) monitor, which facilitates the establishment of a connection between the defibrillator system and the interrogation device. This connection allows for the transmission of data from the defibrillator to the interrogator, enabling a thorough review of the device's operational parameters and performance. The evaluation includes a detailed analysis of ECG recordings to identify any arrhythmias, as well as a comparison of current data with previous acquisitions to track any changes in the patient's cardiac status. The procedure also involves assessing the frequency and duration of arrhythmias, ectopic beats, and mode switch episodes, along with evaluating exercise and physiological stress responses. Additionally, the interrogation assesses the device's ability to sense and capture cardiac rhythms accurately, ensuring that the leads and battery are functioning correctly. Any alerts generated by the device are carefully reviewed, and the findings are communicated to the patient, accompanied by a written report summarizing the evaluation results.
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