Relatively high procedural success rate was observed in patients with an EPS diagnosis of AVNRT 293(96.7%) compared to patients with left-sided accessory pathways 75(71.43%), right-sided accessory pathways 49(63.64%) and multiple accessory pathways 17(60.71%) (Table-3).
Patients with Wolff-Parkinson-White syndrome had manifest left anterolateral (LAL) , left posterolateral (LPL), or left posteroseptal (PS) accessory pathways were further separated.
Conclusion: ECG algorithm based on delta wave morphology / polarity had better predictive accuracy in identifying the accessory pathway location in Wolf-Parkinson White syndrome.
That's because these drugs can trigger an antegrade conduction along the accessory pathway. (18) In this subset of patients, use a Class 1 antiarrhythmic such as flecainide or procainamide, or amiodarone for rate control (1) (TABLE 1).
WPW syndrome is a type of pre-excitation syndrome and is caused by the accessory pathway, mainly bundle of Kent joining atria and ventricle bypassing the normal atrio-ventricular pathway.
Wolff-Parkinson-White syndrome is the most common of the preexcitation syndromes and is due to an accessory pathway connecting the atria and ventricles.