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Therapeutic and Diagnostic Benefits of Intentional Crosstalk Mediated Ventricular Output Inhibition

Ventricular output inhibition due to crosstalk is generally considered unsafe and something that should be avoided. Special circuits have been incorporated in some dual chamber pacing systems to absolutely prevent this from happening. However, in patients with intact atrioventricular conduction, crosstalk mediated ventricular output inhibition can be beneficial to the evaluation and management of the patient. Utilizing this technique, one can achieve single chamber atrial paced rates which greatly exceed the rates allowed by lower rate limit programming to facilitate an assessment of the integrity of AV nodal conduction and to both convert and suppress some pathological tachyarrhythmias. The methods of achieving crosstalk and its utilization in four patients is discussed in this report.