title: Coronary sinus pacer lead simulating left atrial mass.
abstract: M-mode and two-dimensional echocardiographic evaluation of a patient with rheumatic heart disease and an atrioventricular sequential pacemaker with a coronary sinus lead showed an echo-producing mass in the left atrium. A repeat study after the coronary sinus lead was replaced by a right atrial screw-in lead revealed the disappearance of the echo-producing mass.
mesh_terms: D003937:Diagnosis, Differential; D004452:Echocardiography; D004867:Equipment Design; D005260:Female; D006325:Heart Atria / Q000000981:diagnostic imaging; D006331:Heart Diseases / Q000000981:diagnostic imaging*; D006801:Humans; D008875:Middle Aged; D010138:Pacemaker, Artificial