Pulmonary hypertension in hypoventilation syndromes
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TLDR
Patients with severe pulmonary hypertension due to alveolar hypoventilation, who were markedly improved after 3 months of noninvasive bi-level positive-pressure ventilation (NIPPV), were accompanied by improved catherisation and echocardiographic indices of right ventricular (RV) function.Abstract:
The object that presented itself to the eyes of the astonished clerk, was a boy – a wonderfully fat boy – habited as a serving lad, standing upright on the mat, with his eyes closed as if in sleep.
– Dickens [1]
In this issue of the European Respiratory Journal , Held et al. [2] report on 18 patients with severe pulmonary hypertension due to alveolar hypoventilation, who were markedly improved after 3 months of noninvasive bi-level positive-pressure ventilation (NIPPV). Mean pulmonary artery pressure (mPAP) and pulmonary vascular resistance (PVR) were 50 mmHg and 6–7 Wood units, respectively, at baseline, and decreased to 30 mmHg and 3–4 Wood units with NIPPV; this was accompanied by improved catherisation and echocardiographic indices of right ventricular (RV) function. The N-terminal pro-brain natriuretic peptide (NT-proBNP) levels also decreased, and the 6-min walk distance (6MWD) improved by 80 m. These results are in striking contrast with the “borderline” (mPAP 20–25 mmHg) or mild (mPAP 25–30 mmHg) pulmonary hypertension generally seen, but with rare exceptions, in patients with respiratory conditions. Borderline or mild pulmonary hypertension due to respiratory conditions is of uncertain clinical relevance, exhibits slow progression controlled by supplemental oxygen and is refractory to drugs targeting the pulmonary circulation [3, 4].
12 of the 18 patients reported by Held et al. [2] fulfilled the criteria of obesity hypoventilation syndrome (OHS), defined by a combination of awake hypercapnia (arterial carbon dioxide tension ( P aCO2) >45 mmHg), a body mass index >30 kg·m−2 and exclusion of other causes that could account for hypoventilation, such as lung or neuromuscular disease [5, 6]. Three of the OHS patients had concomitant chronic obstructive pulmonary disease (COPD) and five patients had COPD without obesity. …read more
Citations
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Journal ArticleDOI
The prevalence of pulmonary hypertension in patients with obesity hypoventilation syndrome: a prospective observational study.
Aljohara S Almeneessier,Samar Z Nashwan,Mostafa Q Alshamiri,Seithikurippu R. Pandi-Perumal,Ahmed S. BaHammam +4 more
TL;DR: PH is very common among patients with OHS who have been referred to sleep disorders clinics and should be considered in the regular clinical assessment of all patients withOHS.
Proceedings ArticleDOI
Exercise pathophysiology in patients with chronic mountain sickness
Herman Groepenhoff,Mart N. van der Plas,Sophia Beloka,Vitalie Faoro,M.J. Overbeek,Fransico Villafuerte,Robert Naeije +6 more
TL;DR: Patients with chronic mountain sickness have a preserved aerobic capacity with a ventilatory response identical to LL at sea level but blunted Ventilatory adaptation compared to HH and LL at altitude likely explained by preserved oxygen delivery because of increased hemoglobine.
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FDG PET Imaging for Identifying Pulmonary Hypertension and Right Heart Failure
TL;DR: 2-deoxy-2-[18F]fluoro-d-glucose (FDG) positron emission tomography (PET) has been used for the measurement of glucose uptake (GU) as an indicator of glucose metabolism in the right heart and pulmonary vasculature and the application of FDG PET modality for assessing PAH severity and clinical outcome is reviewed.
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Isolated mild sleep-associated hypoventilation in children with Down syndrome.
Wai Wong,Dennis Rosen +1 more
TL;DR: Mildly elevated ETCO2 in the absence of OSA is common in children with DS and may be considered a normal variant not necessitating intervention other than close monitoring for pulmonary hypertension.
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Obstructive Ventilatory Disorder in Heart Failure-Caused by the Heart or the Lung?
TL;DR: The role of pivotal diagnostic tools such as pulmonary function tests and cardiopulmonary exercise test to determine the contribution of HF and COPD to symptoms and clinical status are discussed.
References
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Extreme obesity associated with alveolar hypoventilation—A pickwickian syndrome
TL;DR: The association of alveolar hypoventilation with obesity is described and reversal of these defects was achieved by means of weight reduction.
Journal ArticleDOI
Exercise Pathophysiology in Patients With Primary Pulmonary Hypertension
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TL;DR: The 4th World Symposium on Pulmonary Hypertension was the first international meeting to focus not only on pulmonary arterial hypertension but also on the so-called non-PAH forms of pulmonary hypertension, those forms associated with left heart disease, chronic lung disease, recurrent venous thromboembolism, and other diseases.
Journal ArticleDOI
The Obesity-Hypoventilation Syndrome Revisited: A Prospective Study of 34 Consecutive Cases
Romain Kessler,Ari Chaouat,Philippe Schinkewitch,Michèle Faller,Simone Casel,Jean Krieger,Emmanuel Weitzenblum +6 more
TL;DR: Patients with OSAS and chronic respiratory insufficiency had in most cases an associated OHS or COPD, suggesting that OHS is an autonomous disease.
Journal ArticleDOI
The transpulmonary pressure gradient for the diagnosis of pulmonary vascular disease
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