title: Studies on the cardiovascular system before surgical intervention.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D001450:Ballistocardiography; D002319:Cardiovascular System / Q000503:physiopathology*; D004562:Electrocardiography; D005260:Female; D006331:Heart Diseases / Q000175:diagnosis* / Q000503:physiopathology; D006801:Humans; D007053:Ice; D008297:Male; D008875:Middle Aged; D011292:Premedication; D011300:Preoperative Care; D013328:Strophanthins / Q000627:therapeutic use*; D013514:Surgical Procedures, Operative / Q000401:mortality*
chemical_list: D007053:Ice; D013328:Strophanthins