The initial transseptal was successfully done.However, during the exchange from the transeptal sheath to the flexcath advance steerable sheath, the wire slipped out of the left atria and the physicians spent several minutes trying to get the wire into left atria but failed.Second transseptal attempt was unsuccessful due to incorrect location, and the third attempt at transseptal access was successful.After the first ablation at the left superior pulmonary vein, the physician found sudden onset of asystole and long pause followed by blood pressure drop.Echocardiography confirmed pericardial effusion.Protamine was injected to reverse heparirization and pericardiocentesis was performed immediately; total 95 ml pericardial effusion was drained.Bp returned to normal range.Patient transferred to ccu for further care.
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