During an atrial fibrillation procedure the ecg showed st elevation when a transseptal puncture was performed.It was believed that air entered through the sheath.After the transseptal puncture, a guide wire and catheter were introduced to place the sheath into the pulmonary vein, and a contrast bolus was delivered to perform angiography.After this sequence, st elevation occurred.The patient was treated with noradrenaline, pacing, and nitroglycerin.After approximately 30 minutes, the patient stabilized.
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