[Comments on B. Bandera's and A. Islas Boni's article].
D002319:Cardiovascular System; D004562:Electrocardiography; D006334:Heart Function Tests; D006801:Humans; D011300:Preoperative Care
CARDIOVASCULAR SYSTEM/function tests; ELECTROCARDIOGRAPHY; PREOPERATIVE CARE
Comentario al trabajo de los doctores B. Bandera y A. Islas Boni.