Antihypertensive Effect of Continuous Positive Airway Pressure in Resistant Hypertensive Patients With Sleep Apnea

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE4

Total Enrollment

45 participants

Study Classification

INTERVENTIONAL

Study Start Date

2008-02-29

Study Completion Date

2013-04-30

Brief Summary

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Obstructive sleep apnea syndrome (OSAS) has been linked to resistant hypertension, but the effect of treatment of OSAS on the resistant hypertension have no been established. In a double-blind randomized clinical trial patients with resistant hypertension with at least moderate sleep apnea will be randomized to receive therapeutic CPAP or Placebo CPAP for eight weeks in an ambulatory set. The investigators want to determine any difference on hypertension control between the 2 management strategies.

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Detailed Description

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This is a double blind, randomized, placebo controlled trial. Participants were consecutive patients with resistant hypertension, defined as uncontrolled BP, despite the concurrent use of 3 or more antihypertensive agents, including a diuretic, with adherence to treatment and without white coat phenomenon. All participants should have a diagnosis of at least moderate OSAS, defined by AHI \> 15 in a portable monitoring sleep exam. Participants were assigned to active CPAP or sham-CPAP. The main outcome was change in 24-hour ambulatory blood pressure (ABP) monitoring values from baseline to two months of active CPAP or sham CPAP

Conditions

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Hypertension

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

TRIPLE

Participants Caregivers Investigators

Study Groups

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active CPAP

auto-PAP with therapeutic pressure

Group Type ACTIVE_COMPARATOR

active CPAP

Intervention Type DEVICE

auto-PAP with pressure between 6 and 12 cm H2O or sham CPAP will be administered to randomized patients

sham-CPAP

auto-PAP with pressure less than 1cm H2O

Group Type SHAM_COMPARATOR

sham-CPAP

Intervention Type DEVICE

The sham-CPAP was the same equipment used for active CPAP (Respironics Remstar-Auto, Murraysville, PA) fixed in the lowest pressure (4cmH2) and modified as recommended by Farré et al. The differences between the two were undetectable except for the pressure generated in the facial mask in the sham-CPAP that was no greater than 1cm H2O.

Interventions

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active CPAP

auto-PAP with pressure between 6 and 12 cm H2O or sham CPAP will be administered to randomized patients

Intervention Type DEVICE

sham-CPAP

The sham-CPAP was the same equipment used for active CPAP (Respironics Remstar-Auto, Murraysville, PA) fixed in the lowest pressure (4cmH2) and modified as recommended by Farré et al. The differences between the two were undetectable except for the pressure generated in the facial mask in the sham-CPAP that was no greater than 1cm H2O.

Intervention Type DEVICE