Metabolic exercise data combined with cardiac and kidney indexes: MECKI score. Predictive role in cardiopulmonary exercise testing with low respiratory exchange ratio in heart failure

The Metabolic Exercise Test Data Combined with Cardiac and Kidney Indexes (MECKI) data-base was utilized to assess prognosis in chronic HF patients performing a symptom-limited CPET with low pRER (< 1.05). Consecutive HF patients with left ventricular ejection fraction  ≤ 40% were prospectively recruited and followed for one year.

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