Transcoronary sinus pacing system, LV summit pacing, early mitral closure pacing, and methods therefor

An early mitral valve closure pacing system, comprising:

• a. a guiding catheter comprising a first guidewire lumen and a second pacing catheter lumen separate from and parallel to the first guidewire lumen, wherein the first guidewire lumen is longer than the second pacing catheter lumen and configured to allow a guidewire to pass therethrough, wherein a distal end of the first guidewire lumen has a first guidewire lumen exit port that is configured to lodge within a coronary sinus of a heart distal to cardiac tissue;
• b. a pacing catheter configured to pass through the second pacing catheter lumen, and having a pacing electrode wire, a pacing needle at a distal end of the pacing electrode wire with a tip capable of piercing the coronary sinus and a pacing needle anchor proximal to the pacing needle electrode and shaped as a pigtail knot formed of the pacing electrode wire configured to lodge in the cardiac tissue without breaching the cardiac tissue to anchor the pacing needle electrode in the coronary sinus, wherein the pacing needle electrode extends at least 1 cm beyond the pacing needle anchor, the pacing catheter being configured to activate early mitral valve closure;
• and
• c. a pacing device configured to engage the pacing electrode wire, wherein the pacing device operates in conjunction with a right ventricular apex pacing device.