Stent-valve delivery system

A delivery system configured to deliver a stent-valve, the delivery system comprising:

• an inner shaft including a distal tip;
• a stent-valve crimped onto the inner shaft, the stent-valve including an upper portion with a plurality of arches, a lower portion, and a valve;
• a proximal sheath disposed over the upper portion of the stent-valve, the proximal sheath having a distal free end with an angled distal edge configured to release the plurality of arches asymmetrically;
• and
• a distal sheath disposed over the lower portion of the stent-valve;
• wherein the proximal sheath and distal sheath are independently actuatable to provide controlled sequential release of the stent-valve.

A method of delivering a stent-valve, comprising:

• inserting a delivery system through a patient's aorta and aortic valve, the delivery system including a stent-valve crimped onto an inner shaft and a proximal sheath disposed over an upper portion of the stent-valve, the proximal sheath having a distal free end with an angled distal edge;
• positioning the angled distal edge relative to anatomical curvature of the patient's aortic arch;
• and
• moving the proximal sheath proximally to release the upper portion of the stent-valve, wherein the angled distal edge releases a first side of the upper portion before an opposite second side based on the anatomical curvature.