| Prospective evaluation of infrahisal second-degree AV block induced by atrial pacing in the presence of chronic bundle branch block and syncope. | |
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MedLine Citation:
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PMID: 8734745 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The value of nonfunctional infrahisal second-degree atrioventricular (AV) block induced by incremental atrial pacing was prospectively examined in 192 patients with chronic bundle branch block (BBB) and syncope. We compared 174 (91%) patients with normal response to atrial pacing (Group I) to 18 (9%) patients with atrial pacing induced nonfunctional infrashisal second-degree AV block (Group II). Patients in group I had higher incidence of organic heart disease, ventricular tachycardia induction, and retrograde ventriculoatrial conduction (P < 0.001, P < 0.05, P < 0.01, respectively), while patients in group II had higher incidence of primary conduction disease and prolonged H-V intervals (P < 0.001, P < 0.01, and P < 0.001). During mean follow-up period of 65 +/- 34 months for group I, and 68 +/- 35 months for group II, a development of spontaneous second- or third-degree AV block was higher in group II (14/18 [78%]), than in group I (15/174 [9%]) (P < 0.001). The site of AV block was infrahisal in all patients in group II, and in 10 of 15 patients in group I. Because of the prophylactic pacing in all patients in group II, the incidence of sudden death was similar among the two groups, but patients in group I had higher incidence of cardiac death (P < 0.05). Conclusion: In patients with chronic BBB and syncope, a nonfunctional infrashisal AV block induced by incremental atrial pacing identified patients with particularly high risk of development of spontaneous infrahisal AV block. Therefore, permanent cardiac pacing is absolutely indicated in these patients. |
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Authors:
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D Petrac; B Radić; K Birtić; J Gjurović |
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Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: Pacing and clinical electrophysiology : PACE Volume: 19 ISSN: 0147-8389 ISO Abbreviation: Pacing Clin Electrophysiol Publication Date: 1996 May |
Date Detail:
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Created Date: 1996-10-21 Completed Date: 1996-10-21 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 7803944 Medline TA: Pacing Clin Electrophysiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 784-92 Citation Subset: IM |
Affiliation:
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Department of Cardiology, University Hospital Sestre Milosrdnice, Zagreb, Croatia. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Aged, 80 and over Arrhythmias, Cardiac / complications Bundle of His / physiopathology* Bundle-Branch Block / complications, therapy* Cardiac Pacing, Artificial / adverse effects*, methods Death, Sudden, Cardiac / etiology Evaluation Studies as Topic Female Follow-Up Studies Heart Atria Heart Block / classification, etiology* Heart Diseases / complications Humans Incidence Male Middle Aged Prospective Studies Risk Factors Syncope / complications, therapy* Tachycardia, Ventricular / complications |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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