Regenerative Therapy Prevents Heart Failure Progression in Dyssynchronous Nonischemic Narrow QRS Cardiomyopathy

Satsuki Yamada, D. Kent Arrell, Almudena Martinez-Fernandez, Atta Behfar, Garvan C. Kane, Carmen M. Perez-Terzic, Ruben J. Crespo-Diaz, Robert J. McDonald, Saranya P. Wyles, Jelena Zlatkovic-Lindor, Timothy J. Nelson, Andre Terzic

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


Background: Cardiac resynchronization therapy using bi-ventricular pacing is proven effective in the management of heart failure (HF) with a wide QRS-complex. In the absence of QRS prolongation, however, device-based resynchronization is reported unsuitable. As an alternative, the present study tests a regenerative cell-based approach in the setting of narrow QRS-complex HF. Methods and Results: Progressive cardiac dyssynchrony was provoked in a chronic transgenic model of stress-triggered dilated cardiomyopathy. In contrast to rampant end-stage disease afflicting untreated cohorts, stem cell intervention early in disease, characterized by mechanical dyssynchrony and a narrow QRS-complex, aborted progressive dyssynchronous HF and prevented QRS widening. Stem cell-treated hearts acquired coordinated ventricular contraction and relaxation supporting systolic and diastolic performance. Rescue of contractile dynamics was underpinned by a halted left ventricular dilatation, limited hypertrophy, and reduced fibrosis. Reverse remodeling reflected a restored cardiomyopathic proteome, enforced at systems level through correction of the pathological molecular landscape and nullified adverse cardiac outcomes. Cell therapy of a dyssynchrony-prone cardiomyopathic cohort translated prospectively into improved exercise capacity and prolonged survivorship. Conclusions: In narrow QRS HF, a regenerative approach demonstrated functional and structural benefit, introducing the prospect of device-autonomous resynchronization therapy for refractory disease.

Original languageEnglish (US)
Article numbere001614
JournalJournal of the American Heart Association
Issue number5
StatePublished - May 2015


  • mechanical discordance
  • proteome
  • resynchronization
  • speckle-tracking
  • stem cells

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine


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