Marco Guazzi et al. JACC 2017;70:

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Marco Guazzi et al. JACC 2017;70:1618-1636 9-Plot CPET Report of a Case of HFrEF With EOV EOV is a specific VE abnormal phenotype occurring in approximately 30% of patients with mid-to-late manifestations of chronic heart failure, characterized by cyclic fluctuation of VE and expired gas kinetics of variable amplitude, frequency, and duration. Because oscillatory manifestations may occur even in normal subjects, criteria for an abnormal definition are an oscillatory pattern at rest that persists for ≥60% of the exercise test at an amplitude of ≥15% of the average resting value (2). CPET = cardiopulmonary exercise testing; EOV = exercise oscillatory ventilation; HR = heart rate; PETco2 = partial pressure of end-tidal carbon dioxide; PETo2 = partial pressure of end-tidal oxygen; RR = respiratory rate; Vco2 = volume of carbon dioxide released; VE = ventilation; Vo2 = peak oxygen consumption; VT = tidal volume. Marco Guazzi et al. JACC 2017;70:1618-1636 2017 American College of Cardiology Foundation