Right Ventricular Function in Obstructive Sleep Apnea

The Evaluation of Subclinical Right Ventricular Dysfunction in Obstructive Sleep Apnea Patients Without Systemic and Pulmonary Arterial Hypertension Using Velocity Vector Imaging

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT00640536

Enrollment

Registered

2008-03-21

Start date

2006-06-30

Completion date

2008-06-30

Last updated

2008-12-01

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Sleep Apnea, Obstructive

Brief summary

The purpose of this study is to determine the structural and functional cardiac alterations in obstructive sleep apne (OSA) independent from systemic and pulmonary arterial hypertension and their correlation to the severity of OSA.

Detailed description

Many risk factors for OSA, such as male gender, obesity, and increasing age are the same as for cardiovascular diseases. This fact makes it more difficult to establish a causal relationship between OSA and cardiovascular diseases. The relationship between OSA and right ventricular (RV) function is controversial. RV dysfunction may be a result of chronic intermittent hypoxia and hypercapnia during apneic episodes. It may also occur secondary to left ventricular dysfunction as a result of increased afterload and sympathetic activity which causes secondary hypertension. As systemic hypertension is one of the most accompanying and contributing factors in OSA along with obesity, we tried to compare the effects of newly diagnosed OSA on RV function with an age and body mass index- matched control group.

Interventions

None listed

Study design

Observational model

CASE_CONTROL

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

18 Years to 80 Years

Healthy volunteers

Yes

Inclusion criteria

For OSA patients (group1) * Apnea Hypopnea Index equal or more than 15 * Epworth sleepiness scale equal or more than 10 * No previous treatment for OSA

Exclusion criteria

* Age \< 18 years * Known hypertension, or 24-hour mean blood pressure of 135 and/or 85 mmHg or more * Mean pulmonary artery pressure \> 25 mmHg * Diabetes mellitus * Left ventricular ejection fraction \< 60% * Moderate to severe valvular disease * Cardiomyopathy * Renal failure * Coronary artery disease * Obstructive or restrictive lung disease demonstrated on pulmonary function test * Connective-tissue or chronic thromboembolic disease * Pericardial disease * Cancer and/or other important comorbidities with an expected survival \< 2 years * Suboptimal echocardiographic images for measurements

Countries

Turkey (Türkiye)

Outcome results