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Respiratory muscle dysfunction in congestive heart failure--the role of pulmonary hypertension.

Abstract：

BACKGROUND:Inspiratory muscle weakness has been described in patients with congestive heart failure (CHF), and only recently in patients with idiopathic pulmonary arterial hypertension. However, the relationship between pulmonary hemodynamics and respiratory muscle function has not been investigated in patients with CHF. METHODS AND RESULTS:In two tertial referral centers for CHF patients, 532 consecutive CHF patients (159 female, age 59 ± 12 years, NYHA I-IV) were studied by right heart catheterization, maximal inspiratory mouth occlusion pressure (Pi(max)) and pressure 0.1s after beginning of inspiration during tidal breathing at rest (P(0.1)). There was a significant correlation between Pi(max) and mean pulmonary artery pressure (PAPm) (r=-0.65, p=0.0023), mean pulmonary capillary wedge pressure (PCWPm) (r=-0.56; p=0.0018), PVR (r=-0.73; p=0.0031), and cardiac output (r=0.51; p=0.0022). Moreover, the ratio P(0.1)/Pi(max) showed a linear correlation with PAPm (r=0.54; p=0.0019), and with TPG (r=0.64; p=0.0014) respectively. Vital capacity was reduced in relation to increased PAPm (r=-0.54; p=0.0029). Pi(max) and P(0.1)/Pi(max) were independent from VC. CONCLUSIONS:This study provides the first evidence of a close relation between inspiratory muscle dysfunction, increased ventilatory drive and pulmonary hypertension in a large patient cohort with CHF. Pi(max) and P(0.1) can easily be measured in clinical routine and might become an additional parameter for the non-invasive monitoring of the hemodynamic severity of disease.

journal_name

Int J Cardiol

journal_title

International journal of cardiology

authors

Filusch A,Ewert R,Altesellmeier M,Zugck C,Hetzer R,Borst MM,Katus HA,Meyer FJ

doi

10.1016/j.ijcard.2010.04.006

subject

Has Abstract

pub_date

2011-07-15 00:00:00

pages

182-5

issue

2

eissn

0167-5273

issn

1874-1754

pii

S0167-5273(10)00221-4

journal_volume

150

pub_type

杂志文章,多中心研究

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