<prompt> Answer this question truthfullyWhat is the definition of postpericardiotomy syndrome?  <response>: <reason> The onset of symptoms is 1 to 6 weeks after cardiac surgery. In general the disease is self-limited and the symptoms and signs are mild and resolve in 2 to 3 weeks.Pericardial effusion may result from the accumulation of fluids as a result of inflammation in the pericardial sac. Cardiac tamponade can occur if the accumulation of fluids in the pericardium is large enough and rapid enough. This occurs in 1 of patients. Constrictive pericarditis can occur if there is a chronic inflammatory response.Prognosis is generally good. 