One- and three-minute exercise response in coronary artery disease
| Autor: | R. Gilbert, Teperow-Putter K, J. H. Auchincloss, David Peppi, M. Kuppinger |
|---|---|
| Rok vydání: | 1979 |
| Předmět: |
Adult
Male medicine.medical_specialty Cardiac output Time Factors Physiology Physical Exertion Coronary Disease Treadmill exercise Coronary artery disease Oxygen Consumption Physiology (medical) Internal medicine medicine Humans Myocardial infarction Cardiac Output Lung business.industry Respiration Carbon Dioxide Middle Aged medicine.disease Control subjects Oxygen uptake Oxygen Cardiology Lung Volume Measurements business human activities |
| Zdroj: | Journal of Applied Physiology. 46:1132-1137 |
| ISSN: | 1522-1601 8750-7587 |
| DOI: | 10.1152/jappl.1979.46.6.1132 |
| Popis: | Treadmill exercise responses of oxygen uptake (VO2), CO2 production (VCO2), and venoarterial CO2 difference (Cv-Ca), measured by CO2 rebreathing (Defares technique) at 1 and 3 min of exercise, were studied in two separate series of control (apparently healthy) and coronary artery disease (CAD) subjects. In the 1-min series there were 21 controls and 15 CAD subjects. In the 3-min series there were 21 controls and 18 CAD subjects. All were males, ages 30--60 yr, and the CAD subjects had histories of myocardial infarction. In both series VO2 at 1 min and power requirement (P ) = 1,000 (VO2–1–1,000) was estimated where P =weight (kg) X grade (fractional) X walking speed (m/min). In the 1-min series (P = 1,000) all measurements were made at 45--60 s in separate test runs. In the 3-min series P was 750 kg.m/min, VCO2 and VO2 were measured at 2.5--3 min exercise, and Cv-Ca was measured at 3--3.25 min in the same test run. Data indicate that the average cardiac output (Q) for control subjects was 15 l/min in both series with lower values for CAD subjects. At 1 min reduced Q was accompanied by reduced VO2 or VCO2 and increased Cv-Ca, whereas at 3 min reduced Q was accompanied by increased Cv-Ca. |
| Databáze: | OpenAIRE |
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