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6%). In one patient with a degenerated 19 mm prosthetic valve, mean gradient after the procedure was 22 mmHg. No patients had a para-valvular leak grade 1. There were no deaths during the hospitalization or at 30 days and one patient suffered a stroke. The Allegra trans-catheter aortic valve offers optimal hemodynamic results in patients with severely degenerated biological aortic valve. The Allegra trans-catheter aortic valve offers optimal hemodynamic results in patients with severely degenerated biological aortic valve.