title: Echocardiography of left atrial wall.
mesh_terms: D001281:Atrial Fibrillation / Q000175:diagnosis*; D004452:Echocardiography; D004554:Electric Countershock; D004562:Electrocardiography; D006325:Heart Atria; D006801:Humans; D008297:Male; D008875:Middle Aged