Secondary objectives:~To assess the diagnostic performance of exercise lung ultrasound for the diagnosis of HFpEF.~To identify the value of the B-lines score on exercise maximizing the sensitivity and specificity for the diagnosis of HFpEF.~To evaluate the relationship of the delta of B-lines scores between rest and exercise with the diagnosis of HFpEF.~To assess the diagnostic performance of the delta of B-lines between rest and exercise for the diagnosis of HFpEF.~To identify the score of the delta of B-lines value between rest and exercise maximizing sensitivity and specificity for the diagnosis of HFpEF.~To evaluate the relationship between the resting value of the B-lines scores with the diagnosis of HFpEF.~To assess the diagnostic performance of the resting lung ultrasound for the diagnosis of HFpEF.~To identify the value of the B-lines score at rest maximizing the sensitivity and specificity for the diagnosis of HFpEF.~To evaluate the correlation between the B-line score measured at rest and exercise and the dyspnoea score measured at rest, during exercise, and during the recovery phase.~To assess the correlation of the delta of B-lines scores between rest and exercise and the dyspnoea score measured at rest, during exercise and during the recovery phase.
The E-LUS study is a prospective, non randomised, monocenter case-control study.~The main objective is to evaluate the association of exercise lung ultrasound data acquired during a stress test on a bicycle ergometer with the diagnosis of heart failure with preserved ejection fraction (HFpEF).