Circular mapping catheter entrapment in mitral valve apparatus requiring emergency surgery: a rarely reported complication of pulmonary vein isolation procedure for atrial fibrillation.Lasso catheter (Biosense Webster) is one of the most commonly employed circular mapping catheters during pulmonary vein isolation (PVI) procedure for atrial fibrillation (AF). 
Biosense Webster
Circular mapping catheter entrapment in mitral valve apparatus requiring emergency surgery: a rarely reported complication of pulmonary vein isolation procedure for atrial fibrillation.Lasso catheter (Biosense Webster) is one of the most commonly employed circular mapping catheters during pulmonary vein isolation (PVI) procedure for atrial fibrillation (AF).  During the procedure, the Lasso catheter inadvertently slipped into the left ventricular cavity and entangled in the mitral valve apparatus. 
Lasso catheter
We report a case of a 59-year-old man who underwent PVI procedure for persistent AF. 
PVI procedure
Circular mapping catheter entrapment in mitral valve apparatus requiring emergency surgery: a rarely reported complication of pulmonary vein isolation procedure for atrial fibrillation.Lasso catheter (Biosense Webster) is one of the most commonly employed circular mapping catheters during pulmonary vein isolation (PVI) procedure for atrial fibrillation (AF).  We report a case of a 59-year-old man who underwent PVI procedure for persistent AF. 
AF
To the best of our knowledge, such a case has not previously been reported in the UK necessitating an immediate open heart surgery, avoiding replacement of the valve.
UK