(b)(4).The results of the investigation are inconclusive since the device was not returned for analysis.Our investigation was limited to the review of the device history record, which showed that each manufacturing and inspection operation was performed and indicated complete in accordance with sjm specifications and procedures.Based on the information received, the cause of the reported st elevation and chest pain could not be conclusively determined.
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During a ventricular tachycardia ablation procedure, chest pain with st elevation occurred.A therapy cool path duo ablation catheter was introduced to the left ventricle vie retrograde access.Geometry was created and the ablation catheter was placed in the left ventricular apex, at which time the catheter impedance increased and the distal end of the catheter displayed out of geometry.A few minutes later the patient complained of chest pain and st elevation was noted on the ekg.An echocardiogram revealed no pericardial effusion and a coronary angiogram revealed no infarction.The physician indicated the cause of the st elevation may have been due to a cardiac perforation at the left ventricular apex, a coronary artery spasm, or an air embolus, none of which could be confirmed.The patient was stable.
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