Method and apparatus for right ventricular resynchronization

An apparatus comprising:

• a first cardiac signal sensing circuit configured to sense an nnrinsic depolarization event in an atrium of a subject;
• a first implantable electrode pair, wherein at least one electrode of the first implantable electrode pair is configured for placement at a location in a right branch of a His bundle of the subject;
• a therapy circuit electrically connectable to the first implantable electrode pair;
• and
• a control circuit communicatively coupled to the first cardiac signal sensing circuit and the therapy circuit, wherein the control circuit includes an AH delay calculation circuit configured to calculate an optimal paced AH delay interval, wherein a paced AH delay interval is shorter than an intrinsic AH delay interval;
• wherein the control circuit is configured to initiate delivery of an electrical stimulation pulse to a stimulation location that is distal to a location of RV conduction block in a right branch of the His bundle, and wherein the delivery of the electrical stimulation pulse is initiated in response to an intrinsic depolarization event sensed in the atrium and after the calculated paced AH delay interval.

An implantable lead including:

• a lead body extending from a proximal end to a distal end having an intermediate portion therebetween, wherein the lead body includes a plurality of conductors disposed therein;
• a first bipolar electrode pair disposed at the distal end of the lead body and coupled to first and second conductors attic plurality of conductors;
• a second bipolar electrode pair disposed at a position more proximal than the first bipolar pair and coupled to third and fourth conductors of the plurality of conductors;
• and
• wherein the lead body includes a shape bias configured to provide placement of the second bipolar pair at a location mid-septum to apical septum of the right ventricle of a subject when the first electrode pair is placed at a location in a His bundle of the subject.