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      Lack of correlation between exercise capacity and indexes of resting left ventricular performance in heart failure

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      The American Journal of Cardiology

      Elsevier BV

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          Most cited references 22

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          Treadmill exercise in assessment of the functional capacity of patients with cardiac disease.

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            The relationship of alterations in systolic time intervals to ejection fraction in patients with cardiac disease.

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              Exercise capacity in patients with severe left ventricular dysfunction.

              Normal or near-normal exercise capacity has been thought to reflect normal left ventricular function. Many compensatory mechanisms could preserve exercise capacity in patients with severe left ventricular dysfunction. We evaluated exercise capacity using a treadmill exercise test in 26 patients with severe left ventricular dysfunction defined by a left ventricular ejection fraction of 30% or less by isotope ventriculography. One half of the patients had normal exercise capacity and a normal cardiothoracic ratio on chest x-ray. This study indicates that traditional predictors of left ventricular function that have been widely used in clinical evaluation of the patients with cardiac disease (cardiothoracic ratio and exercise capacity) can be normal in a significant number of patients with severe left ventricular dysfunction. Thus, left ventricular function cannot be accurately estimated using these traditional predictors and should be assessed quantitatively. The isotope ventriculogram appears to be ideal for this purpose.
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                Author and article information

                Journal
                The American Journal of Cardiology
                The American Journal of Cardiology
                Elsevier BV
                00029149
                January 1981
                January 1981
                : 47
                : 1
                : 33-39
                Article
                10.1016/0002-9149(81)90286-1
                © 1981

                http://www.elsevier.com/tdm/userlicense/1.0/

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