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Aims Heart failure with preserved ejection fraction (HFpEF) is one of the major diagnoses in dyspnoeic subjects, and H2 FPEF score enables robust differentiation of HFpEF. Given ventilatory abnormalities prevail in subjects with HFpEF, the associations between H2 FPEF score and pulmonary function remain to be elucidated. Methods and results Subjects who presented with exertional dyspnoea and had left ventricular ejection fraction of 50% were eligible for this study. Total lung capacity, forced expiratory volume in the 1 s, and forc