Troubleshooting Cardiac Resynchronization Therapy in Nonresponders
Sumandeep Dhesi1, Evan Lockwood2, Roopinder K Sandhu1
1Division of Cardiology, University of Alberta, Edmonton, Alberta, Canada.
The Canadian Journal of Cardiology
|July 2, 2017
Summary
Cardiac resynchronization therapy (CRT) improves outcomes for heart failure patients. However, 20-40% do not respond, necessitating further research into nonresponse causes and solutions for better heart failure management.
Area of Science:
- Cardiology
- Biomedical Engineering
Background:
- Heart failure (HF) remains a significant health concern with high morbidity and mortality despite pharmacotherapy.
- Cardiac resynchronization therapy (CRT) offers a revolutionary treatment for symptomatic HF patients with reduced ejection fraction and QRS prolongation.
Purpose of the Study:
- To review the current understanding of CRT nonresponse in heart failure patients.
- To highlight the challenges in identifying causes of nonresponse and the need for a comprehensive approach.
Main Methods:
- Review of existing literature on CRT efficacy and nonresponse.
- Analysis of factors contributing to CRT outcomes in heart failure.
Main Results:
- CRT demonstrates benefits including ventricular remodeling, improved function, and survival, but response rates vary.
- A significant percentage of patients (20-40%) are identified as CRT nonresponders.
Conclusions:
- CRT is a valuable treatment for specific HF populations, yet nonresponse remains a challenge.
- Further research is crucial to elucidate the multifactorial reasons for CRT nonresponse and develop targeted solutions.
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