The major complications in heart transplant recipients are rejection and infection. However, bleeding, pericardial tamponade, cardiac dysrhythmia, circulatory overload, and reduced cardiac output are other complications reported. Here, we report a case of congestive heart failure (CHF) due to constrictive pericarditis on top of orthotopic heart transplantation. This rare complication must be considered in the differential diagnosis of post-transplant CHF in the absence of any other common etiologies. The patient had pericardial effusion in the early post-transplant period and subsequently presented with heart failure unresponsive to standard medical management. Early diagnosis of pericardial constriction after orthotopic heart transplantation requires a high index of clinical suspicion and optimal use of imaging procedures.