title: Letter: Echocardiography of heart and pericardial effusion.
mesh_terms: D004452:Echocardiography; D004699:Endocardium / Q000502:physiology; D006321:Heart / Q000502:physiology* / Q000503:physiopathology; D006801:Humans; D010490:Pericardial Effusion / Q000503:physiopathology*