title: Response of Class IV patients to alpha blockade prior to open-heart surgery.
mesh_terms: D000317:Adrenergic alpha-Antagonists / Q000008:administration & dosage*; D000328:Adult; D000368:Aged; D006348:Cardiac Surgical Procedures; D006349:Heart Valve Diseases / Q000601:surgery; D006350:Heart Valve Prosthesis; D006801:Humans; D008875:Middle Aged; D010643:Phenoxybenzamine / Q000008:administration & dosage*; D011183:Postoperative Complications / Q000517:prevention & control; D011229:Preanesthetic Medication; D011300:Preoperative Care
chemical_list: D000317:Adrenergic alpha-Antagonists; D010643:Phenoxybenzamine