Key result
A patient with cardiac sarcoidosis received inappropriate ICD shocks for dual AV nodal nonreentrant tachycardia, which satisfied both rate and V>A criteria for ventricular tachycardia.
Case Report (n=1)
Cardiac sarcoidosis may alter refractoriness and conduction, contributing to the occurrence of DAVNNT which can mimic ventricular tachycardia and lead to inappropriate ICD therapy.
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DAVNNT may trigger inappropriate ICD shocks in cardiac sarcoidosis by mimicking VT; single case leaves open prevalence and device programming implications.
Dual atrioventricular nodal nonreentrant tachycardia (DAVNNT) occurs due to concurrent antegrade conduction over fast and slow atrioventricular nodal pathways and is treated by slow pathway modification. We describe a unique case of a patient with cardiac sarcoidosis who received inappropriate ICD shocks for DAVNNT. Atrial and ventricular device electrograms satisfied both rate and V>A criteria for ventricular tachycardia. We postulate that alterations in refractoriness and conduction as is seen in cardiac sarcoidosis (CS) may have contributed to occurrence of DAVNNT.
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Karnik et al. (2014) conducted a case report in Cardiac sarcoidosis (n=1). Cardiac sarcoidosis was evaluated on Inappropriate ICD shocks. A patient with cardiac sarcoidosis received inappropriate ICD shocks for dual AV nodal nonreentrant tachycardia, which satisfied both rate and V>A criteria for ventricular tachycardia.
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