
Fusion during entrainment of orthodromic reciprocating tachycardia is enhanced for basal pacing sites but diminished when pacing near Purkinje system end points
Keywords: AP, accessory pathway; AVN, atrioventricular node; AVNRT, atrioventricular nodal reentrant tachycardia; ECG, electrocardiogram; LV, left ventricle/ventricular; ORT, orthodromic atrioventricular reciprocating tachycardia; PCL, pacing cycle length; PS, His-