The added prognostic value of ventilatory efficiency to the Weber classification system in patients with heart failure.


BACKGROUND The Weber classification system is a well established method for categorizing patients according to peak oxygen consumption (VO(2)), but it is unknown whether ventilatory efficiency adds prognostic value. The purpose of the current study was to assess the added prognostic value of the minute ventilation/carbon dioxide production (VE/VCO(2)) slope… (More)


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