ABSTRACT
Objective:To study influence of renal sympathetic denervation (RDN)on cardiac function of dogs with heart failure (HF).Methods:A total of 40 dogs were randomly and equally divided into RDN group [received bilat- eral renal artery radiofrequency ablation (RFA)]and model group (only received femoral puncture).Pacemaker was implanted in every dog,and dog HF model was established using rapid right ventricular pacing.Cardiac and re-nal function indexes,BNP and sympathetic activity index levels were observed and compared between two groups be- fore RFA/sham operation,instant and four weeks after model establishment.Results:After operation four weeks, compared with model group,there were significant reductions in levels of epinephrine (E)[(362.69±42.54)ng/ml vs.(290.36±42.32)ng/ml],renin (R)[(305.46± 39.68)ng/ml vs.(230.04±32.80)ng/ml],aldosterone (AD)[(408.00±38.56)ng/ml vs.(246.00± 48.37)ng/ml],angiotensin Ⅱ (ATⅡ)[(280.00±48.08)pg/ml vs.(172.00±25.04)pg/ml]and norepinephrine (NE)[(425.65±50.54)ng/ml vs.(316.76±46.29)ng/ml]in RDN group (P<0.05 all);there were significant reductions in HR,respiratory rate (RR)and BNP level in RDN group,P<0.05 all;there were significant rise in SBP,LVEF,CO,CI,left ventricular pressure maximal rising rate (+dp/dtmax),left ventricular pressure maximal dropping rate (-dp/dtmax)and left ventricular end-systolic pressure (LVESP),and significant reductions in left ventricular end-systolic dimension (LVESd),left ventricular end-diastolic dimension (LVEDd)and left ventricular end-diastolic pressure (LVEDP)in RDN group,P<0.05 all.Conclusion:RDN can decrease renal sympathetic activity,improve heart function,inhibit myocardial remode- ling,its therapeutic effect is significant
ABSTRACT
Objective: To observe influence of long-term exercise training on carotid intima-media thickness (IMT) in patients with mild-moderate hypertension. Methods: A total of 92 patients with essential mild-moderate hypertension were randomly divided into routine treatment group (n=46) and exercise group (n=46, received exercise training based on routine treatment) according to number table. All patients were followed up for one year, and the blood pressure, carotid artery diameter and carotid IMT were measured, compared and analyzed in two groups before and after treatment. Results: There was no significant difference in systolic and diastolic blood pressure before treatment between two groups (P＞0.05). Compared with baseline value, there were significant decrease in systolic blood pressure [(176.66±l1.78)mmHg vs. (130.89±13.01)mmHg], diastolic blood pressure [(101.43±6.41)mmHg vs. (81.71±8.45)mmHg], carotid artery diameter [(6.62±0.97)mm vs. (6.22±1.01)mm] and carotid IMT [(0.98±0.12)mm vs. (0.84±0.11)mm] in exercise group after one-year training (P<0.05 all), and they were all significantly lower than those of routine treatment group (P<0.05 all ). Conclusion: Long-term exercise training can effectively control blood pressure, decrease carotid artery diameter and carotid intima-media thickness.