Oversensing

Medtronic Device: ICD Field: Oversensing

Medtronic paths associated with this specificity

Patient implanted with a single-chamber ICD (Protecta XT VR) for ischemic cardiomyopathy; this tracing illustrates the characteristic pattern of the graph during an oversensing of the T-wave.

Patient implanted with a dual-chamber ICD (Virtuoso DR) for ischemic cardiomyopathy and hospitalized for syncope and for electrical shock. This tracing allows emphasizing the risks associated with T-wave oversensing. 

Young patient implanted with a single-chamber ICD (Protecta XT VR) for Brugada syndrome; this tracing illustrates the value of a specific algorithm for diagnosing T-wave oversensing and avoiding the occurrence of inappropriate therapies. 

Patient implanted with a single-chamber ICD for Brugada syndrome; episodes of T-wave oversensing.

Patient with ischemic cardiomyopathy implanted with a dual-chamber ICD (Evera XT DR), hospitalized for lipothymias; history of paroxysmal AF; this tracing illustrates the problem of atrial oversensing by the ventricular lead.

Patient with ischemic cardiomyopathy implanted with a dual-chamber ICD Evera XT DR; recording of an episode classified as VF in the device memory in conjunction with interference generated by a poorly insulated household appliance.

Patient implanted with a triple-chamber ICD (Viva XT CRT-D) not followed in the department, hospitalized for multiple electrical shocks in the absence of prior symptoms; this tracing illustrates a "historical" case of lead fracture.

Patient implanted with a dual-chamber ICD having undergoing a change of generator (Evera XT DR); induction procedure at the end of the procedure; this tracing shows how an electrical shock can reveal a lead dysfunction.

Patient implanted with a triple-chamber ICD (Viva XT CRT-D) for primary dilated cardiomyopathy and hospitalized for syncope; this tracing illustrates the risk of asystole in conjunction with an oversensing caused by lead dysfunction.

Patient implanted with a dual-chamber ICD (Evera XT DR) for hypertrophic cardiomyopathy; the day after implantation, highlighting of non-sustained VT episodes in the device memory in conjunction with a connection defect.

Patient with dilated cardiomyopathy implanted with a single-chamber ICD (Protecta XT VR); this tracing shows the functioning of the specific noise diagnosis algorithm on the right ventricular lead.