Microcirculation and Inflammatory Markers in Patients With Resistant, Stages 1/2 Hypertension and Normal Blood Pressure (MICRORAH)

April 29, 2016 updated by: Daniel Alexandre Bottino

Inflammatory Biomarkers and Endothelial Function Assessed by Venous Occlusion Plethysmography and Nailfold Videocapillaroscopy in Patients With Resistant Hypertension, Stages 1 and 2 and Normotensive

Nailfold videocapillaroscopy (NVC), Venous occlusion Plethysmography (VOP) and inflammatory biomarkers have been used to study endothelial function in patients with resistant hypertension, stages 1 and 2 hypertension and normotensive. This was a cross-sectional study.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Detailed Description

Microcirculation determines peripheral resistance contributing to increased blood pressure. The nailfold videocapillaroscopy (NVC), Venous occlusion Plethysmography (VOP) and biomarkers can be used to evaluate the microcirculation in arterial hypertension (AH). The objective of this study is to analyze the behavior of serum inflammatory markers and study the microcirculation by nailfold videocapillaroscopy (NVC) and Venous Occlusion Plethysmography in patients with resistant hypertension (RH), with stages 1 and 2 hypertension (MMH ) and normotensive (CG). A cross-sectional study with 75 patients has been performed: 25 with resistant hypertension (RH), 25 with stages 1 and 2 hypertension (MMH) and 25 normotensive (CG). All underwent anamnesis, dosage serum markers and conducting NVC, VOP. Hypertensive patients without statin use and with controlled or uncontrolled blood pressure were also analyzed. For the statistical analysis were used: Kruskal -Wallis ANOVA, Dunn test and ANCOVA for correction of confusion factors such as age and BMI.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
75

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

27 years to 65 years (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

First Day: Full clinical examination was performed, including measurements of at-rest blood pressure, weight and height in order to calculate Body Mass Index (BMI), waist and hip measurements.

Second Day: drawing blood for laboratory analyses, Nailfold Videocapillaroscopy and Venous Occlusion Plethysmography.

Description

Inclusion Criteria:

  • Clinical diagnosis of controlled High Blood Pressure stages 1 and 2 (blood pressure levels from 140/90 mmHg to 179/109 mmHg) .
  • Resistant Hypertension (uncontrolled hypertension, with values ≥140/90 mmHg, using three or more antihypertensive drugs of different classes, including a diuretic, or controlled hypertension with four or more drugs).
  • Normal Blood Pressure.

Exclusion Criteria:

  • Diabetes Mellitus, Types 1 or 2.
  • Heart Failure.
  • Myocardial infarction or stroke with less than three months of the event.
  • Chronic kidney disease.
  • Use of hormonal or non-hormonal anti-inflammatory drugs.
  • Recent trauma (less than three months).
  • Autoimmune diseases.
  • Infectious processes in activity.
  • Neoplasia.
  • Aspirin use (anti-inflammatory dose).
  • Obesity grade III (Body Mass Index>40 kg/m2).

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
Resistant Hypertension (RH)
uncontrolled hypertension, with values ≥140/90 mmHg, using three or more antihypertensive drugs of different classes, including a diuretic, or controlled hypertension with four or more drugs.
Stages 1 and 2 Hypertension (MMH)
According to the VI Brazilian Guidelines of hypertension, with blood pressure levels ranging from 140/90 mmHg to 179/109 mmHg, with up to two antihypertensive drugs of different classes and blood pressure levels controlled in the last two months.
Normotensive (CG)
Blood Pressure <140/90 mmHg and without comorbidities.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Blood Pressure (mmHg)
Time Frame: 1 day
Hemodynamic Variable
1 day

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Functional Capillary Density (FCD, number capillaries/mm2 )
Time Frame: 1 day
Microcirculatory variable from Nailfold Videocapillaroscopy
1 day
Afferent Capillary Diameter (micrometer)
Time Frame: 1 day
Microcirculatory variable from Nailfold Videocapillaroscopy
1 day
Apical Capillary Diameter (micrometer)
Time Frame: 1 day
Microcirculatory variable from Nailfold Videocapillaroscopy
1 day
Efferent Capillary Diameter (micrometer)
Time Frame: 1 day
Microcirculatory variable from Nailfold Videocapillaroscopy
1 day
Red Blood Cell Velocity (mm/s)
Time Frame: 1 day
Microcirculatory variable from Nailfold Videocapillaroscopy
1 day
Maximum Red Blood Cell Velocity (mm/s)
Time Frame: 1 day
Microcirculatory variable from Nailfold Videocapillaroscopy
1 day
Time to reach Maximum Red Blood Cell Velocity (s)
Time Frame: 1 day
Microcirculatory variable from Nailfold Videocapillaroscopy
1 day
Waist circumference (cm)
Time Frame: 1 day
Anthropometrical Variable
1 day
Hip circumference (cm)
Time Frame: 1 day
Anthropometrical Variable
1 day
Waist to Hip Ratio
Time Frame: 1 day
Anthropometrical Variable
1 day
Body Mass Index (Kg/m2)
Time Frame: 1 day
Anthropometrical Variable
1 day
Maximal Forearm Blood Flow during reactive Hyperemia
Time Frame: 1 day
Vascular Reactivity Variables from Venous Occlusion Plethysmography
1 day
Maximal Forearm Blood Flow after sublingual nitroglycerine
Time Frame: 1 day
Vascular Reactivity Variables from Venous Occlusion Plethysmography
1 day
Vascular Cell Adhesion Molecule (VCAM, ng/dl)
Time Frame: up to 2 weeks
Inflammatory Biomarker
up to 2 weeks
Intercellular Adhesion Molecule (ICAM, ng/dl)
Time Frame: up to 2 weeks
Inflammatory Biomarker
up to 2 weeks
Adiponectin (ng/dl)
Time Frame: up to 2 weeks
Inflammatory Biomarker
up to 2 weeks
Endothelin (pg/dl)
Time Frame: up to 2 weeks
Inflammatory Biomarker
up to 2 weeks
C Reactive Protein (CRP, mg/dl)
Time Frame: up to 2 weeks
Inflammatory Biomarker
up to 2 weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Daniel Alexandre Bottino

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Rio de Janeiro State University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
May 1, 2015

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
December 1, 2015

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 1, 2015

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
April 20, 2016

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
April 29, 2016

First Posted (Estimate)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
May 3, 2016

Study Record Updates

Last Update Posted (Estimate)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
May 3, 2016

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
April 29, 2016

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
April 1, 2016

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • RiodeJaneiro_StateUniversity
  • BIOVASC-UERJ (Other Identifier: Clinical and Experimental Research Lab on Vascular Biology)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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