Alert message for ventricular arrhythmia: episode of classified ventricular fibrillation

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N° 12
Manufacturer Biotronik Device Remote monitoring Field Messages and events
Patient

This 57-year-old woman received a Lumax 540 HF-T triple chamber defibrillator for primary prevention in the context of dilated cardiomyopathy with a depressed left ventricular ejection fraction and left bundle branch block. An alert message was transmitted a few months after device implantation.

Graph and trace

Telemedicine report

Alert message (yellow status) for episode of classified ventricular fibrillation.

The report indicates that the patient suffered an episode diagnosed in the VF zone, with interruption of the capacitors charge and without shock delivery. The analysis of the EGM shows typical intermittent oversensing of a 50 Hz signal (presence of overload of the baseline on the various channels).

Comments

In view of this alert, the patient was seen the next day in consultation. The emitting source of this signal was easily identified as a poorly insulated household appliance. The early diagnosis prevented the delivery of inappropriate therapy, one of the most disabling complications in recipients of defibrillators.