Improving cardiac resynchronization therapy response with multipoint left ventricular pacing: Twelve-month follow-up...

Area of Science:

• Cardiology
• Medical Devices
• Heart Failure Management

Background:

• Cardiac resynchronization therapy (CRT) with multipoint left ventricular (LV) pacing (MPP) improves LV function and reverse remodeling in the short term.
• The long-term effects of MPP on LV function and remodeling require further investigation.

Purpose of the Study:

• To evaluate the efficacy of MPP in improving LV function at 12 months post-implantation.
• To compare the long-term effects of MPP versus conventional CRT on LV reverse remodeling.

Main Methods:

• Patients received CRT implants and were randomized to conventional CRT (CONV) or MPP, optimized with pressure-volume (PV) loop guidance.
• CRT response was defined as a ≥15% reduction in end-systolic volume (ESV) and alive status at 12 months.

Main Results:

• After 12 months, 76% of MPP patients and 57% of CONV patients were CRT responders (P = .33).
• MPP demonstrated significantly greater ESV reduction (P = .03) and EF increase (P <.001) compared to CONV.
• Median EF increase was 15% with MPP versus 5% with CONV.

Conclusions:

• PV loop-guided MPP sustains improvements in LV reverse remodeling and function at 12 months.
• MPP offers superior long-term benefits for LV function and remodeling compared to conventional CRT.