Key result
Four cases of Medtronic Marquis family ICD malfunction shared a defective connection between the header post and right ventricular terminal pin, causing inappropriate shocks in two patients.
Case Report (n=4)
Highlights a specific mechanical failure in Medtronic Marquis ICDs causing malfunction and inappropriate shocks, emphasizing the need for better device tracking.
Alerts to possible header defects in Marquis ICDs; leaves open the scope of improved post-market surveillance.
Four cases of ICD system malfunction occurring within the Medtronic Marquis family over a limited time frame are reported. These cases shared a common element of defective connections between the header post and the right ventricular pace/sense terminal pin that required intervention and reconnection. Inappropriate shocks occurred in two cases. The circumstances of these cases provide important information about the potential difficulties with these devices and highlight the deficiencies of the current system in tracking and analyzing device-related problems.
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Pickett et al. (2004) conducted a case report in ICD system malfunction (n=4). Medtronic Marquis family ICD was evaluated on ICD system malfunction. Four cases of Medtronic Marquis family ICD malfunction shared a defective connection between the header post and right ventricular terminal pin, causing inappropriate shocks in two patients.
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