Pulmonary vein dilation in patients with atrial fibrillation: Detection bymagnetic resonance imaging

Citation
Hm. Tsao et al., Pulmonary vein dilation in patients with atrial fibrillation: Detection bymagnetic resonance imaging, J CARD ELEC, 12(7), 2001, pp. 809-813
Citations number
21
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Cardiovascular & Respiratory Systems","Cardiovascular & Hematology Research
Journal title
JOURNAL OF CARDIOVASCULAR ELECTROPHYSIOLOGY
ISSN journal
1045-3873 → ACNP
Volume
12
Issue
7
Year of publication
2001
Pages
809 - 813
Database
ISI
SICI code
1045-3873(200107)12:7<809:PVDIPW>2.0.ZU;2-D
Abstract
Introduction: The positive relationship between left atrial (LA) size and a trial fibrillation (AF) is well recognized; however, there is little inform ation on the association of pulmonary vein (PV) diameter and AF, The purpos e of this study was to investigate by magnetic resonance angiography the ch ange of PV and LA size in patients with no history of AF, patients with par oxysmal AF (PAF), and patients with chronic AF (CAF). Methods and Results: The study included 47 patients. Group I included 15 pa tients with normal sinus rhythm and no history of documented AF, Group II i ncluded 24 patients with drug-refractory PAF who underwent electrophysiolog ic study and radiofrequency ablation of PV foci, Group III included 8 patie nts with CAF who were converted to sinus rhythm by external electrical card ioversion, Age and concomitant heart diseases were similar among the three groups. We measured the diameter of each PV at its junction with the LA in addition to LA dimensions by gadolinium-enhanced magnetic resonance angiogr aphy with three-dimensional reconstruction. Significant dilation of both su perior PVs (P < 0.01) and transverse diameter of LA (P < 0.01) was seen in the three groups. There were no significant changes of both inferior PVs, c orrected PV (PV/LA) diameter, or longitudinal diameter of LA among the thre e groups. Only 28% patients showed arrhythmogenic foci from the largest PV, Conclusion: Significant dilation of both superior PVs with simultaneous LA enlargement was demonstrated in PAF and CAF patients. Although PV size cann ot predict AF firing, the anatomic and geometric differences may participat e in perpetuation of AF.