Acute Mediastinal Bleeding with Pleural Escape: Case Report of a Rare Interventional Complication with Unusual Resolve.

Acute mediastinal bleeding is a very rare complication of cardiac intervention. It is a life-threatening situation when this condition causes acute compression of the mediastinal area. A 59-year-old man was diagnosed with inferior ST-elevation myocardial infarction with ongoing chest pain and underwent an urgent percutaneous coronary intervention procedure. After coronary stent was implanted, patient complained of chest tightness, and suffocation, blood pressure dropped, O ₂ saturation dropped, and was difficultly intubated. Image acquisition by C-arm showed a large bulging in aortic arch area. Contrast-enhanced computed tomography ruled out aortic dissection, but noted a large mediastinal mass that was radiated to the neck. The bulging was spontaneously regressed, and a large left pleural effusion was developed. Left pleural tapping was performed on day 7, and a total of 1.5-L hemorrhagic fluid was evacuated. In our case, unusual drainage from mediastinal to pleural space has probably save the patient.