Physical activity in chronic respiratory conditions: assessing risks for physical activity clearance and prescription.
University of British Columbia, Room 209, Unit 1, Osborne Centre, Vancouver, BC, Canada.Canadian family physician Medecin de famille canadien (impact factor: 1.19). 07/2012; 58(7):761-4. pp.761-4
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ABSTRACT: Patients with chronic obstructive pulmonary disease (COPD) markedly increase their pulmonary artery wedge pressure on mild exercise even though they have no overt left heart disease and no increase in the esophageal pressure (as a reflection of mean intrathoracic pressure). We wondered if lung distension due to gas trapping during the hyperpnea of exercise might cause the wedge pressure to rise by increasing juxtacardiac pressures above esophageal pressures. If this were so, then (1) tachypnea alone, without exercise, should cause the FRC and intracardiac pressures to increase in patients with COPD, (2) there should be an increase in FRC associated with the rise in wedge pressure on exercise, and (3) these changes should not occur in patients without COPD. We studied 39 patients with COPD (Ppa = 21 +/- 6 mm Hg [mean +/- SD], FEV1 [% predicted] = 39 +/- 16) and 13 control patients with similar pulmonary artery pressures but no airflow obstruction (Ppa = 22 +/- 20 mm Hg, FEV1 [% predicted] = 110 +/- 24). In those with COPD, light exercise raised the FRC by 0.5 +/- 0.5 L. Tachypnea alone, at the rate present during exercise, raised the FRC by 0.6 +/- 0.4 L and there was a 10% increase in left lower lobe area on lateral chest X-ray. Wedge, right atrial, and pulmonary artery pressures rose together during tachypnea with and without exercise. By contrast, in the control patients without COPD, the right atrial pressure change on exercise did not reflect that of the left atrium in extent or direction.(ABSTRACT TRUNCATED AT 250 WORDS)The American review of respiratory disease 09/1988; 138(2):350-4. · 10.19 Impact Factor
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ABSTRACT: Comorbidities such as cardiac disease, diabetes mellitus, hypertension, osteoporosis, and psychological disorders are commonly reported in patients with chronic obstructive pulmonary disease (COPD) but with great variability in reported prevalence. Tobacco smoking is a risk factor for many of these comorbidities as well as for COPD, making it difficult to draw conclusions about the relationship between COPD and these comorbidities. However, recent large epidemiologic studies have confirmed the independent detrimental effects of these comorbidities on patients with COPD. On the other hand, many of these comorbidities are now considered to be part of the commonly prevalent nonpulmonary sequelae of COPD that are relevant not only to the understanding of the real burden of COPD but also to the development of effective management strategies.Proceedings of the American Thoracic Society 06/2008; 5(4):549-55.
Article: Pulmonary rehabilitation improves depression, anxiety, dyspnea and health status in patients with COPD.[show abstract] [hide abstract]
ABSTRACT: To determine the impact of an 8-wk program of comprehensive pulmonary rehabilitation on depression, anxiety, dyspnea, and health-related quality of life in patients with chronic obstructive pulmonary disease (COPD). We studied 24 patients with severe COPD randomized either to pulmonary rehabilitation (PR), (n = 10; FEV1 30 +/- 9%) or control (C; n = 14; FEV1 34 +/- 11%). The PR program included disease education, energy conservation techniques, relaxation, and exercise including 20-min arm elevation with dumbbells and 20-min leg exercise sessions three times a week for 8 wks. At baseline and after completion of the program, all patients were evaluated using the Beck Depression Inventory, State Trait Anxiety Inventory (STAI), Modified Medical Research Council Scale (MRC), and St. George's Respiratory Questionnaire (SGRQ). After PR, there was a significant improvement in the severity of depression (P < 0.01), a decrease in symptoms (P < 0.05), an increase in daily living activities (P < 0.05), and a decrease in the total score of the SGRO (P < 0.01). Dyspnea measured by the MRC scale was significantly better in the PR group (P < 0.01). The present study shows that in patients with severe COPD, pulmonary rehabilitation induces important changes on depression and anxiety independent of changes in dyspnea and health-related quality-of-life.American Journal of Physical Medicine & Rehabilitation 01/2007; 86(1):30-6. · 1.58 Impact Factor
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