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Establishing the diagnosis of heart failure (HF) in people presenting with dyspnea can be challenging when they lack corroborative structural abnormalities like reduced left ventricular ejection fraction (LVEF) or clinically apparent volume overload. In a single-site study, researchers assessed noninvasive characteristics associated with HF; the reference standard was invasive hemodynamic exercise test results.
Study participants were 414 consecutive people with preserved LVEF and without significant underlying functional or structural cardiac abnormalities and no evidence of volume overload at rest who underwent invasive exercise testing for unexplained dyspnea. Of the participants, 267 were found to have HF (pulmonary capillary wedge press…