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Left ventricular lead implantation at the optimal site and appropriately\u2010timed left ventricular pacing (LVP) resulted in left ventricle reverse remodeling. Left ventricular dyssynchrony did not improve with LVP at a timing that resulted in narrower QRS than an intrinsic QRS duration. The optimization of LVP timing in CRT for patients with a narrow QRS duration is discussed.<\/jats:p>","DOI":"10.1111\/pace.14585","type":"journal-article","created":{"date-parts":[[2022,8,22]],"date-time":"2022-08-22T12:20:52Z","timestamp":1661170852000},"page":"182-184","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Is narrowest QRS the best? 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