Deflectable mapping guide sheath for his bundle pacing

A delivery device for delivering a pacing lead to the His bundle of a patient's heart, the delivery device comprising:

• a handle;
• an elongated sheath having a proximal end connected to the handle and a distal end remote from the handle, a distal portion of the sheath having a plurality of flexible sections spaced from one another along a length of the sheath;
• a pull wire having a distal end connected to the sheath distally of the flexible sections and extending to a proximal end of the pull wire;
• and
• a plurality of mapping electrodes positioned at the distal end of the sheath,
• wherein the handle has a longitudinal axis and the proximal end of the sheath enters the handle at a first position at a predetermined angle transverse to the longitudinal axis and exits the handle at a second position at the predetermined angle transverse to the longitudinal axis, and
• wherein the distal end of the sheath has a distal end face, and the plurality of mapping electrodes are spaced from the distal end face.

A delivery device for delivering a pacing lead to the His bundle of a patient's heart, the delivery device comprising:

• a handle;
• an elongated sheath having a proximal end connected to the handle and a distal end remote from the handle, the distal end having a distal tip, a distal portion of the sheath having a plurality of flexible sections spaced from one another along a length of the sheath;
• a pull wire having a distal end connected to the sheath distally of the flexible sections and extending to a proximal end of the pull wire;
• and
• a plurality of mapping electrodes positioned at the distal end of the sheath, the mapping electrodes including two electrodes that diametrically oppose one another at a position spaced from the distal tip of the sheath,
• wherein the distal portion of the sheath is deflectable within a deflection plane, and the two electrodes lie within the deflection plane when the distal portion of the sheath is deflected.