BACKGROUND: Reentrant atrial tachycardias may occur after mitral valve surgery. These usually involve the left atrium or the lateral wall of the right atrium around the atriotomy scar. OBJECTIVE: The purpose of this study was to test whether ablation could eliminate atrial tachycardia after mitral valve repair. METHODS: Three patients (two men, one woman; mean age 57 +/- 12 years) were studied 48 +/- 38 months after mitral valve repair. In all cases, the surgical approach involved a transseptal incision. Tachycardia mapping was performed using multipolar catheters and the three-dimensional electroanatomic mapping system. The mean flutter cycle length was 313 +/- 21 ms. All patients had dual-loop reentry with one circuit around a septal scar and the other circuit around the tricuspid annulus. RESULTS: Successful radiofrequency ablation of the septal circuit was performed between the scar and the superior tricuspid annulus in all three cases. CONCLUSION: After mitral valve repair using a transseptal incision, dual-loop reentry may occur around the septal scar and the tricuspid annulus. Successful ablation may be achieved with an ablation line between the scar and the tricuspid annulus.
BACKGROUND: Reentrant atrial tachycardias may occur after mitral valve surgery. These usually involve the left atrium or the lateral wall of the right atrium around the atriotomy scar. OBJECTIVE: The purpose of this study was to test whether ablation could eliminate atrial tachycardia after mitral valve repair. METHODS: Three patients (two men, one woman; mean age 57 +/- 12 years) were studied 48 +/- 38 months after mitral valve repair. In all cases, the surgical approach involved a transseptal incision. Tachycardia mapping was performed using multipolar catheters and the three-dimensional electroanatomic mapping system. The mean flutter cycle length was 313 +/- 21 ms. All patients had dual-loop reentry with one circuit around a septal scar and the other circuit around the tricuspid annulus. RESULTS: Successful radiofrequency ablation of the septal circuit was performed between the scar and the superior tricuspid annulus in all three cases. CONCLUSION: After mitral valve repair using a transseptal incision, dual-loop reentry may occur around the septal scar and the tricuspid annulus. Successful ablation may be achieved with an ablation line between the scar and the tricuspid annulus.
Authors: Róbert Pap; Mária Kohári; Attila Makai; Gábor Bencsik; Vassil Borislavov Traykov; Rodrigo Gallardo; Gergely Klausz; Kis Zsuzsanna; Tamás Forster; László Sághy Journal: J Interv Card Electrophysiol Date: 2012-07-27 Impact factor: 1.900