[Pneumopericardium after open-heart surgery: a report of two cases].
D000328:Adult; D006348:Cardiac Surgical Procedures; D005260:Female; D006344:Heart Septal Defects, Atrial / Q000601:surgery; D006801:Humans; D008875:Middle Aged; D008944:Mitral Valve Insufficiency / Q000601:surgery; D008946:Mitral Valve Stenosis / Q000601:surgery; D011026:Pneumopericardium / Q000209:etiology*; D011183:Postoperative Complications; D014262:Tricuspid Valve Insufficiency / Q000601:surgery