RESUMEN
Today, there are 382 million people living with diabetes. A further 316 million with impaired glucose tolerance are at high risk from the disease – an alarming number that is set to reach 471 million by 2035. One of the most overlooked of all serious complications of diabetes is cardiovascular autonomic neuropathy (CAN) which encompasses damage to the autonomic nerve fibers that innervate the heart and blood vessels, resulting in abnormalities in heart rate control and vascular dynamics. The present report discusses the clinical manifestations (eg, resting tachycardia, orthostatic hypotension exercise intolerance, intra operative cardiovascular liability, silent myocardial infarction (MI), and increased risk of mortality) in the presence of CAN. The reported prevalence of CAN varies greatly depending on the criteria used to identify CAN and the population studied. CAN prevalence ranges from as low as 2.5% of the primary prevention cohort in the Diabetes Control and Complications Trial (DCCT) to as high as 90% of patients with long-standing type 1 diabetes who were potential candidates for a pancreas transplantation. Objective: The aim of this study was to evaluate the Cardiac Autonomic Neuropathy (CAN) among diabetic patients.This study included patients with T1 DM and 20 patients with T2 DM total (97 male, 86 female) diabetic patients. The CAN diagnosed by 6 clinical tests: Resting Heart Rate (RHR), Expiration : Inspiration (E:I) ratio, Heart rate response to standing (30:15 ratio), Orthostatic hypotension (OH) and Sustained Hand Grip (SHG) using Cardiac Autonomic Neuropathy System Analyzer CAN-504. CAN was indicated at least two of five tests are abnormal.Diabetic patients’ mean age was 48.74±12.74, diabetes duration 7.55±5.72, systolic blood pressure 136.25±22.76mm Hg, diastolic blood pressure 84.82±11.90 mmHg, cholesterol 5.04±1.04mmol/l, triglyceride 2.20±1.24mmol/l, LDL2.64±0.85mmol/l, HDL 1.12±0.41mmol/l, non-HDL 3.71±1.06, cholesterol/HDL ratio 4.70±1.29, HBA1c 10.08±2.39%. Result of RHR resting heart rate test was normal 92%, borderline 0.5% and abnormal 7.1%,Expiration:inspiration(E:I) ratio was normal 72.7%,borderline 13.7% and abnormal 14%, Heart rate response to standing (30:15ratio) was normal 47%,borderline 13.714% and abnormal 39.3%, Valsalva was normal 97.8%,borderline 2.2% and abnormal 0%, Orthostatic hypotension (OH) was normal 66%,borderline 29% abnormal 6% and Sustained hand grip(SHG) test was normal 4.9%,borderline 9%, and abnormal 87.8%.Number of abnormal cardiac autonomic neuropathy test results 2 (with cardiac autonomic neuropathy) was in 97(53%) among diabetic patients. Among diabetic patients cardiac autonomic neuropathy (CAN) was 53%.