The Spectrum of Tachyarrhythmias in Preexcitation Syndromes

  • Fred Morady


A variety of tachyarrhythmias may occur in patients with preexcitation syndromes. These tachyarrhythmias are usually associated with symptoms, ranging in severity from mild to life-threatening. Therefore, many patients with preexcitation syndromes and tachyarrhythmias will require treatment. The most appropriate form of therapy for these patients will depend upon the particular mechanism of the tachyarrhythmia. Although invasive electrophysiologic testing is often required to establish the mechanism of a tachyarrhythmia, in many patients the electrocardiogram may provide important clues to the type of tachycardia [1,2]. This chapter reviews the spectrum of tachyarrhythmias in preexcitation syndromes and highlights the value and limitations of the electrocardiogram in the diagnosis of these tachyarrhythmias.


Atrial Fibrillation Atrial Flutter Left Bundle Branch Block Right Atrial Right Bundle Branch Block 
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© Martinus Nijhoff Publishing 1986

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  • Fred Morady

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