Antiarrhythmic Drug Therapy in Patients with Preexcitation Syndromes

  • Eric N. Prystowsky


Patients with preexcitation syndromes may exhibit a variety of tachyarrhythmias [1]. The accessory pathway(s) associated with a particular preexcitation syndrome may be used as part of an atrioventricular (AV) reentrant tachycardia circuit (i.e., orthodromic or antidromic reciprocating tachycardia), or in certain arrhythmias such as atrial fibrillation the accessory pathway may not be needed to sustain tachycardia but is utilized to conduct impulses to the ventricle. Patients with preexcitation syndrome also may have tachycardias that do not involve conduction over the accessory pathway, such as ventricular tachycardia [2].


Atrial Fibrillation Accessory Pathway Effective Refractory Period Reentrant Tachycardia Tachycardia Cycle Length 
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© Martinus Nijhoff Publishing 1986

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  • Eric N. Prystowsky

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