The Evaluation of Subclinical Right Ventricular Dysfunction in Obstructive Sleep Apnea Patients Without Systemic and Pulmonary Arterial Hypertension Using Velocity Vector Imaging
Overview
- Phase
- N/A
- Intervention
- Not specified
- Conditions
- Sleep Apnea, Obstructive
- Sponsor
- Florence Nightingale Hospital, Istanbul
- Enrollment
- 53
- Locations
- 1
- Status
- Completed
- Last Updated
- 17 years ago
Overview
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.
Investigators
Eligibility Criteria
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
Outcomes
Primary Outcomes
Not specified