Phase 4 Study on Olmesartan, an Angiotensin Receptor Blocker, on Ambulatory Blood Pressure Change, Vitamin D Levels and Urinary Sodium Excretion of Patients With Hypertension
试验速览
- 阶段
- 不适用
- 入组人数
- 100
- 试验地点
- 1
- 主要终点
- The primary objective is the change in the 24-hour mean systolic blood pressure from baseline to the day after post-treatment week-12 visit according to the ambulatory blood pressure monitoring.
研究概览
简要总结
We will conduct an open label, non-comparative, observational study to evaluate the efficacy, safety and tolerability of Olmesartan therapy in Taiwan patients with essential hypertension, and the primary objective is the change in the 24-hour mean systolic blood pressure from baseline to the day after post-treatment week-12 visit according to the ambulatory blood pressure monitoring.
详细描述
Vitamin D plays an important role for cardiac function and blood pressure regulation, and the serum 25(OH)D concentration change is an important indicator for Vitamin D nutritional status, and serum 1,25(OH)2D is an active hormone for biological actions. However, little is known about the change of vitamin D concentration was related to the usage of angiotensin receptor blocker among patients with hypertension.
We will conduct an open label, non-comparative, observational study to evaluate the efficacy, safety and tolerability of Olmesartan therapy in Taiwan patients with essential hypertension, and the primary objective is the change in the 24-hour mean systolic blood pressure from baseline to the day after post-treatment week-12 visit according to the ambulatory blood pressure monitoring. Our second endpoints included:
- Change in the 24-hour mean diastolic blood pressure from baseline to the day after post-treatment week-12 visit
- To evaluate the reduction in office blood pressure, including SeSBP and SeDPB, with Olmesartan 20mg therapy at 4,8,12 weeks (only for subjects with week-4, week-8 visit)
- Control rate [% of patients] at 12weeks, defined by Defined as SBP less than 140mmHg and / or DBP less than 90mmHg or a reduction more than 10 mmHg for DBP and / or more than 20mmHg SBP versus baseline values
- Biomarker assessment Vitamin D change from the baseline 24-hour urinary sodium excretion change from the baseline
- To evaluate the efficacy and tolerability of Olmesartan 20mg at 12 weeks based on global assessment by the physicians and patients
The major aim of this proposal is to investigate the effect of angiotensin receptor blocker, Olmesartan, for a 12 weeks' treatment among patients with hypertension in the outpatient clinics in one hospital center. We set the blood pressure measured from ambulatory blood pressure monitor as the primary endpoint. Furthermore, we will test Vitamin D related concentrations and 24 hour urine sodium excretion change with the blood pressure change. We will recruit 200 patients with hypertension in this observational study and will evaluate the efficacy and safety issues among these patients. The specific aims of this proposal will include:
- Test the improvement of blood pressure change in 24-hour blood pressure monitor by an angiotensin receptor blocker, Olmesartan, among hypertensive patients
- Test the change of vitamin D concentrations and 24-hour urinary sodium excretion change after this angiotensin receptor blocker, Olmesartan, treatment
- Test the association between blood pressure change and vitamin D-related measurements among the drug treatment, We hypothesize that the blood pressure change was related to the change of serum vitamin D concentration and also related to urinary sodium excretion change. .
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 90 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Male or female, 18 years of age or over.
- •naïve patients with Stage I** or Stage II** (JNC VII) essential hypertension or patients uncontrolled on current hypotensive drug therapy (in cuff BP>140/90mm Hg)
- •All selected patients must give their written informed consent before recording their personal data
排除标准
- •Subject with secondary form of hypertension
- •Subject is being treated or with unstable condition for disease of myocardial infarction, clinically decompensated congestive heart failure, angina pectoris, sick sinus syndrome, second or third degree atrioventricular block
- •Subject with history of hypertensive encephalopathy, grade 3 or 4 hypertensive retinopathy within 3 months before entering this trial
- •Subjects with a cerebrovascular accident within 6 months before entering this trial
- •Subject with auto-immune disease
- •Subject with uncontrolled endocrine diseases, such as Hyperthyroidism, Hypothyroidism, Hypercorticism and Hypocorticism
- •Subject with confirmed evidence of renal impairment (creatinine > 1.5 x upper limit of normal)
- •Subject with hyperkalemia with serum potassium > 5.5 meq/L
- •Subject with terminal stage of malignant disease
- •Subject with substance abuse history
- •Subject with gastrointestinal disease which can interfere the absorption of the oral medications
- •Subject with any contraindication to the use of angiotensin II receptor blocker or calcium channel blocker
- •Subject is pregnant or lactating
- •Premenopausal subjects not taking reliable methods for contraceptives
- •Subject with any other serious disease considered by the investigator not in the condition to enter the trial
- •Subject is not able to comply to the protocol requirements
- •Subject participated investigational drug trial within 3 months before entering this study
研究组 & 干预措施
Hypertension
干预措施: olmesartan (Drug)
结局指标
主要结局
The primary objective is the change in the 24-hour mean systolic blood pressure from baseline to the day after post-treatment week-12 visit according to the ambulatory blood pressure monitoring.
时间窗: 12 weeks
次要结局
- Change in the 24-hour mean diastolic blood pressure from baseline to the day after post-treatment week-12 visit(12 weeks)