Age (59 ? 16) years old (14-96 years old), 84 males (56%). 49 patients with hypertension (32.6%), 9 patients with history of coronary heart disease (6.0%), 20 patients with diabetes (13.3%), 2 patients with arrhythmia (1.3%), 3 cases of malignant tumor (2.0%). Among the selected patients, there were 1 pregnant woman (0.6%) and 2 patients (1.3%) who needed dialysis for renal dysfunction.