Left atrial myxoma causing fluttering of the posterior mitral leaflet.
D004452:Echocardiography; D005260:Female; D006325:Heart Atria; D006338:Heart Neoplasms / Q000175:diagnosis*; D006801:Humans; D008875:Middle Aged; D008944:Mitral Valve Insufficiency / Q000209:etiology*; D009232:Myxoma / Q000175:diagnosis*