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Simultaneous coronary sinus and left bundle area pacing conferred cardiac resynchronization super response after either alone failed
  • Xiaoke Liu,
  • Yong-Mei Cha
Xiaoke Liu
Borgess Heart Insititue
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Yong-Mei Cha
Mayo Clinic
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Abstract

Background: A patient with ischemic cardiomyopathy and left bundle branch block (LBBB) who did not respond to standard bi-ventricular pacing underwent attempted left bundle area (LBA) pacing to achieve better cardiac resynchronization (CRT). Methods: LBA pacing failed to correct the LBBB or narrow the QRS. However, simultaneous pacing through the coronary sinus (CS) and LBA pacing leads resulted in marked shortening of the QRS Results: The patient’s EF improved from 30% to 45% two months post procedure and heart failure symptoms improved by one functional class. Conclusions: Simultaneous LBA and CS pacing may improve clinical outcomes compared to either alone.