title: Clinical study of "A waves" (atrial waves) in impedance cardiograms.
mesh_terms: D001281:Atrial Fibrillation / Q000503:physiopathology; D004562:Electrocardiography; D006327:Heart Block / Q000503:physiopathology; D006331:Heart Diseases / Q000503:physiopathology*; D006334:Heart Function Tests; D006801:Humans; D009200:Myocardial Contraction; D010992:Plethysmography, Impedance