Subjects
cardiomyopathy, diabetes
UNCONTROLLED HYPERTENSION, CARDIAC ARRHYTHMIAS, PARKINSON'S DISEASE, CARDIOMYOPATHY, AUTONOMIC DYSFUNCTION, DIABETES
Patients with American Society of Anesthesiologists (ASA)-I or ASA-II classification, scheduled for elective, noncardiothoracic, nonneurosurgical and nonlaparoscopic surgery under general anaesthesia were eligible for inclusion in this prospective, nonrandomised interventional trial. Patients at high risk of autonomic dysfunction (e.g. diabetes, uncontrolled hypertension, Parkinson's disease), cardiac arrhythmias, and known cardiomyopathy were excluded.