Reentry in a morphologically realistic atrial model.

摘要: Reentry in Morphologically Realistic Atria.Introduction: Atrial fibrillation is the most common cardiac arrhythmia. In ablation procedures, identification of reentrant pathways vital. This has proven difficult because complex morphology atria. The purpose this study was to ascertain role specific anatomic structures on reentry induction and maintenance. Method Results: A computationally efficient, morphologically realistic, computer model atria developed that incorporates its major structural features, including discrete electrical connections between right left atria, physiologic fiber orientation three dimensions, muscle representing crista terminalis (CT) pectinate muscles, openings for veins AV valves. Reentries were induced near venous mouth coronary sinus, free wall atrium. roles certain muscular ascertained by selectively removing observing how propagation activity affected. Conclusion: (1) sheath sinus acts as a pathway circuit stabilizes any circuits utilize isthmus inferior vena cava. (2) Poor trans-CT coupling serves stabilize flutter circuits. (3) Wall thickness an important factor activity, especially (4) superior venae cavae form natural anchors make easier initiate allowing smaller ectopic beats induce reentry.