Analysis of Heart Rate Variability in Elderly Patients with Essential Hypertension and Coronary Heart Disease

Objective To study autonomic nerve system character in elderly patients with essential hypertension and coronary heart disease. Methods The heart rate variability (HRV) in 59 essential hypertension (EH), 54 coronary heart disease (CHD), 38 essential hypertension and coronary heart disease (EHCHD) patients and 34 healthy elderly subjects were investigated. Results Except the SDNN Index of EH there were significant difference between HRV in the patients with EH, CHD and healthy elderly subjects ( P 0 05), There were much significant difference between HRV in the patients with EHCHD and healthy elderly subjects ( P 0.01), but no significant difference between HRV in the patients with EH and CHD ( P 0.05). Conclusion The autonomic nerve system function of EH and CHD patients are damaged, and the EHCHD patients is the most. The vagal hypoactivity and sympathetic hyperactivity were major causes of reduction of HRV in the elderly patients.\;