A case of an 85-year-old male on apixaban and clopidogrel undergoing pacemaker implantation is described. After procedure he developed unilateral tension hemothorax and required emergent drainage and exploratory thoracotomy. No vascular, cardiac, or pulmonary source was identified. After multidisciplinary discussions, it was speculated that spontaneous intercostal vessel rupture due to forceful coughing and elevated blood pressure during the procedure was the most likely cause of bleeding.
Keywords: cardiac pacemaker; cardiology devices; critical hemorrhagic shock; intercostal vessel rupture; tension hemothorax.
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