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The principal aim of the study is to determine whether the hemodynamic parameters measured with the two methods -impedance cardiography and applanation tonometry- can be predictive of the antihypertensive effect of two different classes of drugs, ATII antagonists and diuretics.
The drugs that will be used in the study are olmesartan and chlorthalidone and the duration of the study is 12 months.
The other basic aim of the study is to determine whether there is a difference (>6mmHg) between the two drugs regarding the reduction of the mean 24hour blood pressure and the effect of them on the hemodynamic parameters.
The hemodynamic parameters that will be measured by applanation tonometry are augmentation index, central blood pressure and pulse wave velocity.
The hemodynamic parameters that will be measured by impedance cardiography are cardiac index, thoracic fluid content index, systemic vascular resistance index and others.
The principal aim of the study is to determine whether the hemodynamic parameters measured with the two methods -impedance cardiography and applanation tonometry- can be predictive of the antihypertensive effect of two different classes of drugs, ATII antagonists and diuretics.
The drugs that will be used in the study are olmesartan and chlorthalidone and the duration of the study is 12 months.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Olmesartan | Active Comparator | ARB administration (OLMESARTAN) at a starting dose and titrating at 15 weeks according to reach blood pressure target |
|
| Chlorthalidone | Active Comparator | Diuretic administration (chlorthalidone) at a starting dose and titrating at 15 weeks according to reach blood pressure target |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Olmesartan | Drug | Administration of olmesartan at starting dose and titrating in order to reach the target blood pressure. |
|
| Measure | Description | Time Frame |
|---|---|---|
| Pulse wave velocity | Measured by Sphygmocor devive | 12 weeks |
| Measure | Description | Time Frame |
|---|---|---|
| Systemic vascular resistance | Measured by impendance cardiography | 12 months |
| Ambulatory blood pressure | Daytime and nighttime systolic and diastolic blood pressure |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Zebekakis Pantelis, Professor | Hypertension Excellence Center, 1st Department of Internal Medicine, AHEPA University Hospital | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Hypertension Excellence Center, AHEPA University Hospital | Thessaloniki | 54635 | Greece |
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| ID | Term |
|---|---|
| C437965 | olmesartan |
| D002752 | Chlorthalidone |
| ID | Term |
|---|---|
| D000096926 | Benzenesulfonamides |
| D013449 | Sulfonamides |
| D000577 | Amides |
| D009930 | Organic Chemicals |
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| Chlorthalidone | Drug | Administration of chlorthalidone at starting dose and titrating in order to reach the target blood pressure. |
|
|
| 12 months |
| D001555 |
| Benzene Derivatives |
| D006841 | Hydrocarbons, Aromatic |
| D006844 | Hydrocarbons, Cyclic |
| D006838 | Hydrocarbons |
| D001577 | Benzophenones |
| D010797 | Phthalimides |
| D007094 | Imides |
| D007659 | Ketones |
| D013450 | Sulfones |
| D013457 | Sulfur Compounds |
| D054833 | Isoindoles |
| D006574 | Heterocyclic Compounds, 2-Ring |
| D000072471 | Heterocyclic Compounds, Fused-Ring |
| D006571 | Heterocyclic Compounds |