Case 9 A Neonate with an ICD and LQT3

Patient: neonate boy with drug refractory ventricular arrhythmias turning out to be long QT syndrome (LQT3).

Index arrhythmia: ventricular fibrillation, out-of-hospital cardiac arrest. Complaint: 7 months after implantation parents observed a shock. Electrogram

Figure 6.9a. From top to bottom: atrial electrogram, near-field and wide-band ventricular electrogram. Markers: AS = atrial sensing; VF = ventricular fibrillation; VS = ventricular sensing.

ICD pulse generator: Prizm DR 1853 HE (Guidant Inc, St Paul, MN, USA); epicardial sense/pace leads and epicardial defibrillation patch.

Tachycardia settings

Bradycardia settings

Mode: AAI 70bpm.

Electrogram interpretation

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