Highlights an undocumented behavior in a specific ICD model where pacemaker-dependent patients may receive inappropriate shocks for nonsustained ventricular tachycardia despite noncommitted programming.
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May lead to inappropriate shocks for NSVT despite noncommitted programming; leaves open need for model-specific verification or firmware review.
We report a patient who received a CPI Ventak AV II DR ICD for ventricular tachycardia and complete heart block without an escape rhythm. During induced nonsustained ventricular tachycardia, the device, although programmed to deliver noncommitted shocks, acted like a committed device. This phenomenon is due to undocumented behavior that is likely to occur in any patient who is pacemaker dependent and has nonsustained ventricular tachycardia.
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Mann et al. (1998) studied this question.
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