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[Plasma endothelin level in hypertensive patients receiving standard anti-hypertensive therapy with or without
Xiao-Hong Liu1, Yi-Fei Li, Chun-Lin Lai
1Department of Cardiology, Shanxi Province People's Hospital, Taiyuan 030012, China. docliuxh@126.com
Insights
Plasma endothelin (ET) levels correlate with essential hypertension (EH) severity. Simvastatin effectively lowers ET and blood pressure in EH patients, suggesting a beneficial combination therapy.
Area of Science:
- Cardiovascular Medicine
- Endocrinology
- Pharmacology
Context:
- Essential hypertension (EH) is a complex condition often associated with elevated plasma endothelin (ET) levels.
- Complications of EH, such as left ventricular hypertrophy (LVH), atrial fibrillation (AF), and lacunar infarction (LI), may further influence ET concentrations.
- The role of statins in modulating ET levels in hypertensive patients remains an area of investigation.
Purpose:
- To investigate the association between plasma ET concentration and blood pressure in patients with essential hypertension (EH), with or without complications.
- To evaluate the potential impact of simvastatin on ET levels in EH patients.
- To explore the correlation between ET levels and the severity of hypertension and its complications.
Summary:
- Plasma ET concentrations were significantly higher in EH patients compared to controls, and further elevated in EH with LVH, AF, or LI.
- ET levels positively correlated with blood pressure severity, left atrial diameter in EH-AF, and left ventricular mass index in EH-LVH.
- Simvastatin treatment led to a significant decrease in ET levels in class 2 and 3 hypertension, and a more pronounced reduction in blood pressure in class 3 hypertension compared to routine treatment.
Impact:
- Findings indicate a strong positive correlation between ET levels and EH severity, including its complications.
- Simvastatin demonstrates a therapeutic benefit by reducing ET levels and improving blood pressure control in EH patients.
- The results suggest that a combined therapeutic approach of antihypertensive drugs and statins may be beneficial for managing essential hypertension.
Objective:
To observe the association between plasma endothelin (ET) concentration and blood pressure level in essential hypertensive (EH) patients with or without complications and possible impact of statins on ET concentration.
Methods:
From Sep 2007 to Mar 2009, 149 patients with EH were analyzed [44 EH, 40 EH complicated by left ventricular hypertrophy (EH-LVH), 36 EH complicated by atrial fibrillation (EH-AF), and 29 EH complicated by lacunar infarction (EH-LI)], 30 healthy persons were selected as controls. EH patients were randomly divided into routine treatment group (calcium antagonists, ACEI, diuretics, beta-receptor blocker for 8 weeks) and simvastatin intervention group (routine treatment + simvastatin 40 mg/d for 8 weeks), plasma ET concentrations before and after drug intervention were measured.
Results:
(1) ET concentration was higher in EH group than that in control group [(71.42 +/- 6.62) pg/ml vs. (45.52 +/- 8.28) pg/ml, P < 0.01]. ET concentration was higher in EH-LVH group, EH-AF group and EH-LI group than that in EH group [(97.67 +/- 10.53) pg/ml, (102.15 +/- 12.96) pg/ml, (103.49 +/- 9.91) pg/ml vs. (71.42 +/- 6.62) pg/ml, P <0.01]. The degrees of elevated blood pressure was positively correlated with ET concentrations(all P < 0.001). (2) The left atrial diameters of EH-AF group were positively correlated with ET concentration (r = 0.684, P < 0.001). The left ventricular mass index of EH-LVH group were positively correlated with ET concentration (r = 0.545, P < 0.001). (3) The percentages of class 3 hypertension in EH-LVH group, EH-AF group and EH-LI group were higher than that in EH group (57.5%, 50.0%, 62.1% vs. 25.0%, all P < 0.05). (4) Blood pressure in class 3 hypertension patient treated with simvastatin decreased more significantly than that in routine treatment group (P < 0.05). (5) ET concentration of class 2 hypertension patient treated with simvastatin decreased significantly than that in routine treatment group (P < 0.05). ET concentrations of class 3 hypertension patient treated with simvastatin and routine treatment patient decreased significantly after treatment (P < 0.05), and the former was lower (P < 0.05).
Conclusion:
The level of ET were positively correlated with the severity of EH. Simvastatin could decrease the ET levels of patients with EH and blood pressure levels of patients with class 3 hypertension. It suggested that therapeutic alliance of antihypertensive drugs and statins could be benefit to patients with EH.
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