Oxygen Uptake Efficiency Slope at a Glance: A Fascinating Index Carrying Unsolved Questions

Affiliations

• ¹ Cardiothoracovascular Department, Cardiology, Giuliano Isontina University Health Authority (ASUGI), European Reference Network for rare, low-prevalence, or complex diseases of the Heart (ERN GUARD-Heart), University of Trieste, Trieste, Italy.
• ² Cardiothoracovascular Department, Cardiology, Giuliano Isontina University Health Authority (ASUGI), European Reference Network for rare, low-prevalence, or complex diseases of the Heart (ERN GUARD-Heart), University of Trieste, Trieste, Italy. Electronic address: marco.merlo79@gmail.com.