Oxygen Deficit During Exercise Testing in Heart Failure
| Autor: | Andrew M. Cross, Michael B. Higginbotham |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Pulmonary and Respiratory Medicine
medicine.medical_specialty Heart disease business.industry chemistry.chemical_element Submaximal exercise Physical exercise Work rate Critical Care and Intensive Care Medicine medicine.disease Oxygen deficit Oxygen chemistry Internal medicine Heart failure medicine Cardiology Physical therapy Cardiology and Cardiovascular Medicine business Anaerobic exercise |
| Zdroj: | Chest. 107:904-908 |
| ISSN: | 0012-3692 |
| DOI: | 10.1378/chest.107.4.904 |
| Popis: | Measurements of oxygen deficit during submaximal exercise were correlated with the anaerobic threshold (as measured by gas exchange analysis), peak work rate on a ramp protocol, and the ability to perform constant work rate exercise in 10 male patients with New York Heart Association class 2 congestive heart failure and 12 age- and gender-matched normal controls. All subjects performed a maximal ramp exercise test for measurement of the anaerobic threshold. In addition, several 15-min constant work rate exercise sessions were conducted to evaluate oxygen deficit, measured as the area between the "ideal" square curve of oxygen consumption at the onset of constant work rate exercise and the actual exponentially shaped curve. Since the oxygen deficit significantly correlated with the plateau oxygen consumption during the 25-W constant work rate exercise (r=0.61, p=0.002), the oxygen deficit was normalized by the rectangular area of 15-min oxygen consumption above baseline. This normalized value significantly correlated with the inverse of the anaerobic threshold (r=0.81, p |
| Databáze: | OpenAIRE |
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