A heart anchor positioning device, comprising: a main body; an elongate shaft having a proximal end that is coupled with the main body and a distal end, and a lumen extending between the proximal end and the distal end, wherein the lumen is adapted to receive through it a tension member thereby to enable the device to be advanced over the tension member so that the distal end of the elongate shaft may be inserted within a patient body, adjacent the heart, while the main body is positioned outside of the patient body; an anchor coupling mechanism (1022, 1024, 1025) positioned at the distal end of the elongate shaft, the anchor coupling mechanism being operable to: engage a heart anchor (12, 14) to move the heart anchor distally and proximally along the tension member and into engagement with a first wall of the heart to urge the first wall toward a second wall of the heart, the anchor coupling mechanism being configured to lock the heart anchor to inhibit proximal movement of the heart anchor along the tension member; and to disengage the heart anchor (12, 14) to allow the elongate shaft and anchor coupling mechanism (1022, 1024, 1025) to be removed from the patient body after deployment of the heart anchor; and a tension indicating mechanism that is configured to indicate a force being applied to the heart anchor by the device; wherein the tension indicating mechanism is operable in a first mode and a second mode, wherein in the first mode the tension indicating mechanism allows the device to engage the heart anchor (12, 14) to urge the first wall toward the second wall without indicating the force being applied by the device, and wherein in the second mode the tension indicating mechanism indicates the force being applied to the heart anchor by the device. a main body; an elongate shaft having a proximal end that is coupled with the main body and a distal end, and a lumen extending between the proximal end and the distal end, wherein the lumen is adapted to receive through it a tension member thereby to enable the device to be advanced over the tension member so that the distal end of the elongate shaft may be inserted within a patient body, adjacent the heart, while the main body is positioned outside of the patient body; an anchor coupling mechanism (1022, 1024, 1025) positioned at the distal end of the elongate shaft, the anchor coupling mechanism being operable to: engage a heart anchor (12, 14) to move the heart anchor distally and proximally along the tension member and into engagement with a first wall of the heart to urge the first wall toward a second wall of the heart, the anchor coupling mechanism being configured to lock the heart anchor to inhibit proximal movement of the heart anchor along the tension member; and to disengage the heart anchor (12, 14) to allow the elongate shaft and anchor coupling mechanism (1022, 1024, 1025) to be removed from the patient body after deployment of the heart anchor; and engage a heart anchor (12, 14) to move the heart anchor distally and proximally along the tension member and into engagement with a first wall of the heart to urge the first wall toward a second wall of the heart, the anchor coupling mechanism being configured to lock the heart anchor to inhibit proximal movement of the heart anchor along the tension member; and to disengage the heart anchor (12, 14) to allow the elongate shaft and anchor coupling mechanism (1022, 1024, 1025) to be removed from the patient body after deployment of the heart anchor; and a tension indicating mechanism that is configured to indicate a force being applied to the heart anchor by the device; wherein the tension indicating mechanism is operable in a first mode and a second mode, wherein in the first mode the tension indicating mechanism allows the device to engage the heart anchor (12, 14) to urge the first wall toward the second wall without indicating the force being applied by the device, and wherein in the second mode the tension indicating mechanism indicates the force being applied to the heart anchor by the device.