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Pulmonary hypertension in obesity-hypoventilation syndrome. 2013

Christoph A Kauppert, and Iris Dvorak, and Florian Kollert, and Frank Heinemann, and Rudolf A Jörres, and Michael Pfeifer, and Stephan Budweiser
Center for Pneumology, Donaustauf Hospital, Ludwigstraße 68, D-93093 Donaustauf, Germany.

BACKGROUND Pulmonary hypertension (PH) is considered a clinically important feature of Obesity-Hypoventilation Syndrome (OHS). We aimed to determine prevalence, characteristics and severity of PH including associations with clinical outcomes after established non-invasive positive pressure ventilation (NPPV). METHODS In a prospective cross-sectional study, clinically stable OHS-patients (NPPV duration ≥ 3 months) were consecutively assessed using echocardiography, serum markers and right-heart catheterization (RHC). NPPV use was quantified via ventilator counters. Blood gases, lung function, Epworth-Sleepiness Scale (ESS), sleep-quality, WHO-functional class (WHO-FC), 6-min walk distance, and health-related quality of life (HRQL) via Severe Respiratory Insufficiency (SRI) questionnaire were assessed. RESULTS Of 177 patients considered, 64 fulfilled inclusion criteria. Among these, 21 patients (10 female/11 male; BMI 45 [40; 53] kg/m(2), PaCO2 39.6 [37.8; 45.5] mmHg (median [quartiles])) gave consent for RHC. Four patients (19%) had normal mean pulmonary artery pressure (mPAP < 20 mmHg), 8 (38.1%) mPAP 20-24 mmHg and 9 (42.9%) manifest PH (mPAP ≥ 25 mmHg), 3 of them with combined pre- and/or postcapillary PH. mPAP was negatively correlated to NPPV use, vital capacity and lung diffusing capacity (p < 0.01 each), and positively to BMI (p < 0.05). NPPV use and vital capacity independently predicted mPAP. In patients with PH, ESS, WHO-FC, and some SRI-items were worse (p < 0.05 each) compared to patients without PH. Multivariate analyses revealed mPAP as the only independent predictor of the SRI-physical functioning domain. CONCLUSIONS Mild to moderate PH is frequent in patients with OHS despite NPPV, mPAP being inversely related to NPPV adherence. PH is associated with impairments in daytime-sleepiness, WHO-FC, HRQL and physical functioning.

UI MeSH Term Description Entries
D006976 Hypertension, Pulmonary Increased VASCULAR RESISTANCE in the PULMONARY CIRCULATION, usually secondary to HEART DISEASES or LUNG DISEASES. Pulmonary Hypertension
D008297 Male Males
D010845 Obesity Hypoventilation Syndrome HYPOVENTILATION syndrome in very obese persons with excessive ADIPOSE TISSUE around the ABDOMEN and DIAPHRAGM. It is characterized by diminished to absent ventilatory chemoresponsiveness; chronic HYPOXIA; HYPERCAPNIA; POLYCYTHEMIA; and long periods of sleep during day and night (HYPERSOMNOLENCE). It is a condition often related to OBSTRUCTIVE SLEEP APNEA but can occur separately. Pickwickian Syndrome,Obesity-Hypoventilation Syndrome,Hypoventilation Syndrome, Obesity,Obesity-Hypoventilation Syndromes
D011175 Positive-Pressure Respiration A method of mechanical ventilation in which pressure is maintained to increase the volume of gas remaining in the lungs at the end of expiration, thus reducing the shunting of blood through the lungs and improving gas exchange. Positive End-Expiratory Pressure,Positive-Pressure Ventilation,End-Expiratory Pressure, Positive,End-Expiratory Pressures, Positive,Positive End Expiratory Pressure,Positive End-Expiratory Pressures,Positive Pressure Respiration,Positive Pressure Ventilation,Positive-Pressure Respirations,Positive-Pressure Ventilations,Pressure, Positive End-Expiratory,Pressures, Positive End-Expiratory,Respiration, Positive-Pressure,Respirations, Positive-Pressure,Ventilation, Positive-Pressure,Ventilations, Positive-Pressure
D011446 Prospective Studies Observation of a population for a sufficient number of persons over a sufficient number of years to generate incidence or mortality rates subsequent to the selection of the study group. Prospective Study,Studies, Prospective,Study, Prospective
D011788 Quality of Life A generic concept reflecting concern with the modification and enhancement of life attributes, e.g., physical, political, moral, social environment as well as health and disease. HRQOL,Health-Related Quality Of Life,Life Quality,Health Related Quality Of Life
D011795 Surveys and Questionnaires Collections of data obtained from voluntary subjects. The information usually takes the form of answers to questions, or suggestions. Community Survey,Nonrespondent,Questionnaire,Questionnaires,Respondent,Survey,Survey Method,Survey Methods,Surveys,Baseline Survey,Community Surveys,Methodology, Survey,Nonrespondents,Questionnaire Design,Randomized Response Technique,Repeated Rounds of Survey,Respondents,Survey Methodology,Baseline Surveys,Design, Questionnaire,Designs, Questionnaire,Methods, Survey,Questionnaire Designs,Questionnaires and Surveys,Randomized Response Techniques,Response Technique, Randomized,Response Techniques, Randomized,Survey, Baseline,Survey, Community,Surveys, Baseline,Surveys, Community,Techniques, Randomized Response
D012131 Respiratory Insufficiency Failure to adequately provide oxygen to cells of the body and to remove excess carbon dioxide from them. (Stedman, 25th ed) Acute Hypercapnic Respiratory Failure,Acute Hypoxemic Respiratory Failure,Hypercapnic Acute Respiratory Failure,Hypercapnic Respiratory Failure,Hypoxemic Acute Respiratory Failure,Hypoxemic Respiratory Failure,Respiratory Depression,Respiratory Failure,Ventilatory Depression,Depressions, Ventilatory,Failure, Hypercapnic Respiratory,Failure, Hypoxemic Respiratory,Failure, Respiratory,Hypercapnic Respiratory Failures,Hypoxemic Respiratory Failures,Respiratory Failure, Hypercapnic,Respiratory Failure, Hypoxemic,Respiratory Failures
D003430 Cross-Sectional Studies Studies in which the presence or absence of disease or other health-related variables are determined in each member of the study population or in a representative sample at one particular time. This contrasts with LONGITUDINAL STUDIES which are followed over a period of time. Disease Frequency Surveys,Prevalence Studies,Analysis, Cross-Sectional,Cross Sectional Analysis,Cross-Sectional Survey,Surveys, Disease Frequency,Analyses, Cross Sectional,Analyses, Cross-Sectional,Analysis, Cross Sectional,Cross Sectional Analyses,Cross Sectional Studies,Cross Sectional Survey,Cross-Sectional Analyses,Cross-Sectional Analysis,Cross-Sectional Study,Cross-Sectional Surveys,Disease Frequency Survey,Prevalence Study,Studies, Cross-Sectional,Studies, Prevalence,Study, Cross-Sectional,Study, Prevalence,Survey, Cross-Sectional,Survey, Disease Frequency,Surveys, Cross-Sectional
D005260 Female Females

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