Prospective evaluation of intrahisian conduction delay.

• DOI: 10.1161/01.cir.59.5.1035
• Publication Date: 2012-06-11T23:57:40Z
• Authors: J H McAnulty; E Murphy; S H Rahimtoola
• Keywords: PR interval; Bundle branch block; Atrioventricular block

We prospectively evaluated 46 patients who had intrahisian conduction delay. Twenty-three a split His potential and 23 prolonged HV interval with normal QRS complex. In those His, the between two potentials averaged 32.7 msec (range 9--90 msec); in nine this was demonstrated only by atrial pacing. The 20 from group 1:1 atrioventricular have been followed for an average of 18.1 months 2--48 months). All are alive. Three syncope, but Holter monitoring revealed no bradyarrhythmias. narrow interval, 73.7 57--180 msec). Twelve these received pacemakers at time bundle study, six symptomatic block five sinus pauses. 11 did not receive 15.1 2--44 three recurrent syncope dizziness, has One patient died myocardial infarction without arrhythmias. Further prospective evaluation delay documented bradyarrhythmias is needed, follow-up averaging 17 up to 4 years, appear require prophylactic permanent decrease morbidity or mortality.