A Comparison of Pattern of Breathing during Incremental Exercise in Patients with Pulmonary Fibrosis and Primary Pulmonary Hypertension
American Journal of Internal Medicine
Volume 1, Issue 4, November 2013, Pages: 31-35
Received: Sep. 20, 2013;
Published: Nov. 10, 2013
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Abdullah Al-Shimemeri, Intensive Care Department, College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Kingdom of Saudi Arabia, Riyadh 11426
Itani M, Intensive Care Department, College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Kingdom of Saudi Arabia, Riyadh 11426
Alghadeer Hend, Department of Medicine, King Abdulaziz Medical City, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
Al-Jahdali Hamdan, Department of Medicine, King Abdulaziz Medical City, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
Al-Moamary Mohamed, Department of Medicine, King Abdulaziz Medical City, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
A. Al-Duhaim Ahmad, Department of Medicine, King Abdulaziz Medical City, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
Mobeireek Abdullah, King Saud University, Riyadh, Saudi Arabia
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It has previously been proposed that the pattern of breathing during exercise, and particularly maximum tidal volume, can be used to distinguish between interstitial lung disease and pulmonary vascular disease; however this has never been formally investigated. This study looks at the impact of incremental exercise on a bicycle ergometer and the impact that such exercise has on breathing pattern, specifically maximum tidal volume. Method: We retrospectively reviewed the incremental exercise tests of 10 patients with pulmonary fibrosis (PF) and 9 with primary pulmonary hypertension (PPH). Patients were exercised using a bicycle ergometer, seated, and breathing into a mouthpiece. Results: The VE/VCO2 relationship was linear in all patients, but PPH patients had higher VE/VCO2 slopes (0.058±0.03) mean ±SD than PF patients (0.039±0.01, P<0.04). The respiratory rate/VE slopes were also higher in PPH patients (0.48±0.17) than in PF patients (0.30±0.14, P<0.02). There was no correlation between the VTmax/IC at the end of exercise and the IC %predicted in either group. However, VTmax as % of IC at the end of exercise in PPH patients (59.1±7.6) was lower than in PF patients (87.0±14.5%, P<0.001). Conclusion: The pattern of breathing during exercise, specifically maximum tidal volume, is different in patients with primary pulmonary hypertension compared with pulmonary fibrosis patients. These changes in the breathing pattern are unrelated to underlying static and dynamic lung function. Thus, the conclusion is that patients who have lung diseases which restrict their breathing often compensate, likely in an effort to avoid dyspnea, by modifying their natural breathing into a more tightly constrained pattern.
Pulmonary Vascular Diseases, Primary Pulmonary Hypertension, Cardiopulmonary Exercise Testing, Chronic Thromboembolic Diseases, Eisenmenger, Riyadh, Saudi Arabia
To cite this article
A. Al-Duhaim Ahmad,
A Comparison of Pattern of Breathing during Incremental Exercise in Patients with Pulmonary Fibrosis and Primary Pulmonary Hypertension, American Journal of Internal Medicine.
Vol. 1, No. 4,
2013, pp. 31-35.
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