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Functional Ventricular Undersensing After Ventricular Ectopic Beats Due to ICD Dynamic Sensitivity
Antonino Micari1, Paolo Bellocchi1, Pasquale Crea1
1Department of Clinical and Experimental Medicine, Cardiology Unit, University of Messina, Messina, Italy.
None:
An 80-year-old patient, previously implanted for idiopathic sustained ventricular tachycardia with a Rivacor VR-T DX implantable cardioverter defibrillator (ICD Biotronik, Berlin, Germany), came to our pacemaker clinic for palpitations. Electrocardiogram (ECG) showed sinus bradycardia with interpolated ventricular ectopic beats. A ventricular-paced event occurred with a coupling interval shorter than the expected one suggesting ventricular undersensing. The phenomenon can be explained by the default ICD sensitivity setting proposed by the manufacturer.
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