title: [Influence of open heart surgery on myocardial performance evaluation of early postoperative left ventricular function and its reserve by atrial pacing exercise (author's transl)].
mesh_terms: D002304:Cardiac Pacing, Artificial; D006348:Cardiac Surgical Procedures; D006331:Heart Diseases / Q000601:surgery; D006801:Humans; D009200:Myocardial Contraction; D011184:Postoperative Period