Post cardiac injury syndrome successfully treated with medications: a report of two cases

Background: Post cardiac injury syndrome (PCIS) is induced by myocardial infarction or cardiac surgery, as well as minor insults to the heart such as percutaneous coronary intervention (PCI), or insertion of a pacing lead. PCIS is characterized by pericarditis after injury to the heart. The relatively low incidence makes differential diagnosis of PCIS after PCI or implantation of a pacemaker a challenge. This report describes two typical cases of PCIS. Case presentation: The first patient presented with signs of progressive cardiac tamponade that occurred two weeks after implantation of a permanent pacemaker. Echocardiography confirmed the presence of a moderate amount of newly-formed pericardial effusion. The second patient underwent PCI for the right coronary artery. However, despite an uneventful procedure, the patient experienced dyspnea, tightness of chest and cold sweats, and bradycardia two hours after the procedure. Echocardiography findings, which showed a moderate amount of newly-formed pericardial effusion, suggested acute cardiac tamponade, and compromised hemodynamics. Both patients recovered with medication. Conclusion: These cases illustrated that PCIS can occur after minor myocardial injury, and that the possibility of PCIS should be considered if there is a history of possible cardiac insult.