Atrioventricular valve replacement

Apparatus for use a native atrio-ventricular valve that is disposed between an atrium and a ventricle of a heart of a subject, the native atrio-ventricular valve including a valve annulus, valve leaflets, chords, and papillary muscles, the apparatus comprising:

• a valve frame that defines a ventricular portion that is configured to be implanted within the ventricle;
• prosthetic valve leaflets disposed within and coupled to the valve frame;
• a plurality of chord-recruiting arms coupled to the ventricular portion of the valve frame;
• and
• a delivery device configured to:
• deliver the valve frame to the native atrio-ventricular valve while maintaining the valve frame in a radially-constrained configuration,
• subsequently, deploy the chord-recruiting arms among the chords of the native atrio-ventricular valve in a rotational configuration of the chord-recruiting arms, in which the chord-recruiting arms extend at least radially from the ventricular portion of the valve frame and curve in a circumferential direction,
• while the chord-recruiting arms are deployed among the chords of the native atrio-ventricular valve:
• initially rotate at least a portion of the valve frame in an opposite circumferential direction from the circumferential direction in which the chord-recruiting arms curve;
• and
• subsequently, rotate at least the portion of the valve frame in the circumferential direction in which the chord-recruiting arms curve.