Linked Life Data

17978836

Source:http://linkedlifedata.com/resource/pubmed/id/17978836

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2008-3-14
pubmed:abstractText
Exercise tolerance inversely correlates with the severity of the disease in patients with idiopathic pulmonary arterial hypertension (IPAH). Cycling and walking protocols are commonly utilized in the evaluation of exercise intolerance in IPAH, but little information exists on possible differences in ventilatory and gas exchange adaptations to these exercise modalities. In a group of patients with moderate to severe IPAH (n = 13), we studied the ventilatory, cardiovascular and gas exchange adaptations to maximal incremental walking (W) and maximal incremental cycling (C). During W, compared to C, the ventilatory equivalents for CO(2) output (V'(E)/V'CO(2)) were significantly higher either expressed as the rate of increment (56 +/- 5 vs. 45 +/- 3; P < 0.0001) or as the absolute values at anaerobic threshold (AT) and at peak exercise. At AT, the increase in V'(E)/V'CO(2) during W was associated with a significant lower value of end-tidal carbon dioxide. At peak W, compared to peak C, dyspnea sensation was higher and arterial oxygen saturation (SpO(2)) was lower (87 +/- 2 vs. 91 +/- 2, P < 0.001). In patients with IPAH the physiologic information obtained with W are different from those obtained with C. Tolerance to W exercise is limited by high ventilatory response and dyspnea sensation. W should be used to assess the degree of lung gas exchange inefficiency and arterial O(2) desaturation during exercise.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
1439-6319
pubmed:author
pubmed:issnType
Print
pubmed:volume
102
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
417-24
pubmed:meshHeading
pubmed:year
2008
pubmed:articleTitle
Pathophysiological adaptations to walking and cycling in primary pulmonary hypertension.
pubmed:affiliation
Department of Clinical Medicine, Università "La Sapienza", v.le Università 37, 00185, Rome, Italy. valli.gabriele@fastwebnet.it
pubmed:publicationType
Journal Article