Acute advanced aortic stenosis.

"Declarations Ethical approvalAll authors have read and approved submission of the manuscript as written, and it has not been published and is not being considered for publication elsewhere in whole or part in any language. Competing interestsDr. Piccolo reports personal fees from Abbott Vascular, Biotronik, Terumo, Amgen, Boehringer Ingelheim, and Daiichi-Sankyo, outside the submitted work. Dr. Esposito reports personal fees from Abbott Vascular, Amgen, Boehringer Ingelheim, Edwards Lifesciences, Terumo, and Sanofi, outside the submitted work and research grants to the institution from Alvimedica, Boston Scientific, and Medtronic, outside the submitted work. Drs Avvedimento, Angellotti, Ilardi, Leone, Scalamogna, Castiello, Manzo, Mariani, Immobile Molaro, Simonetti, Spaccarotella, and Franzone have no conflicts of interest to declare. Competing interests Dr. Piccolo reports personal fees from Abbott Vascular, Biotronik, Terumo, Amgen, Boehringer Ingelheim, and Daiichi-Sankyo, outside the submitted work. Dr. Esposito reports personal fees from Abbott Vascular, Amgen, Boehringer Ingelheim, Edwards Lifesciences, Terumo, and Sanofi, outside the submitted work and research grants to the institution from Alvimedica, Boston Scientific, and Medtronic, outside the submitted work. Drs Avvedimento, Angellotti, Ilardi, Leone, Scalamogna, Castiello, Manzo, Mariani, Immobile Molaro, Simonetti, Spaccarotella, and Franzone have no conflicts of interest to declare."

"Funding Open access funding provided by Università degli Studi di Napoli Federico II within the CRUI-CARE Agreement. Dr. Leone is supported by a research grant provided by the CardioPath PhD program."