Clinical Application of Cardiac Output During Ramp Exercise Calculated Using the Fick Equation
نویسندگان
چکیده
منابع مشابه
Cardiac output during exercise by the open circuit acetylene washin method: comparison with direct Fick.
An open-circuit (OpCirc) acetylene uptake cardiac output (QT) method was modified for use during exercise. Two computational techniques were used. OpCirc1 was based on the integrated uptake vs. end-tidal change in acetylene, and OpCirc2 was based on an iterative finite difference modeling method. Six subjects [28-44 yr, peak oxygen consumption (VO(2)) = 120% predicted] performed cycle ergometry...
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متن کاملMeasurement of cardiac output during exercise.
T here are a variety of reasons why the clinician would want to measure cardiac output. In the intensive care unit (ICU), life-threatening hypoperfu-sion states may be subject to manipulation. Outside the ICU, low cardiac output may limit the quality of life. A functional definition of heart failure is a cardiac output insufficient for metabolic needs. Implicit in this is the magnitude of these...
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Simultaneous estimates of cardiac output were made during graded upright maximal exercise in 10 male subjects by means of Doppler velocity spectrum of ascending aortic flow, apical two-dimensional echocardiograms, thermodilution, and Fick oximetry. In 15 subjects, aortic annular and root diameters were measured during similar exercise from parasternal two-dimensional echocardiograms. The linear...
متن کاملComparison of cardiac output determined by a carbon dioxide-rebreathing and direct Fick method at rest and during exercise.
1. To study the validity of a CO2-rebreathing method at rest and during graded exercise, cardiac output was measured simultaneously on 59 occasions in 16 subjects with normal pulmonary function with the CO2-rebreathing method and the direct Fick method for oxygen. The correlation coefficient between the results of both methods was significantly higher during exercise than at rest. 2. No systema...
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ژورنال
عنوان ژورنال: Japanese Circulation Journal
سال: 1997
ISSN: 0047-1828,1347-4839
DOI: 10.1253/jcj.61.488