Abstract: A prosthetic heart valve may include a collapsible and expandable valve frame, and a prosthetic valve assembly disposed within the valve frame. A tether may extend between a first end and a second end, the second end being coupled to the valve frame. The tether may be formed of a metal filament and have a length sufficient to extend through a ventricular wall when the prosthetic heart valve is implanted in an atrioventricular valve annulus. An anchor system may be provided and may include an epicardial anchor and a locking mechanism to crimp or to otherwise frictionally engage the tether without piercing the tether. Additional accessory tools may be provided to assist in crimping or uncramping the tether from the epicardial pad.