?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Bundle+Branch+Reentrant+Ventricular+Tachycardia+%0A%0A&rft.creator=Mazur%2C+Alexander&rft.creator=Kusniec%2C+Jairo&rft.creator=Strasberg%2C+Boris&rft.subject=Indian+Pacing+and+Electrophysiology+Journal&rft.description=Bundle+branch+reentrant+(BBR)+tachycardia+is+an+uncommon+form+of+ventricular+tachycardia+(VT)+incorporating+both+bundle+branches+into+the+reentry+circuit.+The+arrhythmia+is+usually+seen+in+patients+with+an+acquired+heart+disease+and+significant+conduction+system+impairment%2C+although+patients+with+structurally+normal+heart+have+been+described.+Surface+ECG+in+sinus+rhythm+(SR)+characteristically+shows+intraventricular+conduction+defects.+Patients+typically+present+with+presyncope%2C+syncope+or+sudden+death+because+of+VT+with+fast+rates+frequently+above+200+beats+per+minute.+The+QRS+morphology+during+VT+is+a+typical+bundle+branch+block+pattern%2C+usually+left+bundle+branch+block%2C+and+may+be+identical+to+that+in+SR.+Prolonged+His-ventricular+(H-V)+interval+in+SR+is+found+in+the+majority+of+patients+with+BBR+VT%2C+although+some+patients+may+have+the+H-V+interval+within+normal+limits.+The+diagnosis+of+BBR+VT+is+based+on+electrophysiological+findings+and+pacing+maneuvers+that+prove+participation+of+the+His-+Purkinje+system+in+the+tachycardia+mechanism.+Radiofrequency+catheter+ablation+of+a+bundle+branch+can+cure+BBR+VT+and+is+currently+regarded+as+the+first+line+therapy.+The+technique+of+choice+is+ablation+of+the+right+bundle.+The+reported+incidence+of+clinically+significant+conduction+system+impairment+requiring+implantation+of+a+permanent+pacemaker+varies+from+0%25+to+30%25.+Long-term+outcome+depends+on+the+underlying+cardiac+disease.+Patients+with+poor+systolic+left+ventricular+function+are+at+risk+of+sudden+death+or+death+from+progressive+heart+failure+despite+successful+BBR+VT+ablation+and+should+be+considered+for+an+implantable+cardiovertor-defibrillator.+&rft.publisher=Indian+Pacing+and+Electrophysiology+Group&rft.contributor=Singh%2C+Balbir&rft.contributor=Lokhandwala%2C+Yash&rft.contributor=Francis%2C+Johnson&rft.contributor=Gupta%2C+Anup&rft.date=2005-04&rft.type=Journal+(Paginated)&rft.type=PeerReviewed&rft.format=text%2Fhtml&rft.identifier=http%3A%2F%2Fcogprints.org%2F4218%2F1%2Fmazur.htm&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Fcogprints.org%2F4218%2F2%2Fmazur.pdf&rft.identifier=++Mazur%2C+Alexander+and+Kusniec%2C+Jairo+and+Strasberg%2C+Boris++(2005)+Bundle+Branch+Reentrant+Ventricular+Tachycardia.++%5BJournal+(Paginated)%5D+++++&rft.relation=http%3A%2F%2Fcogprints.org%2F4218%2F