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Case Reports
. 2019 Jun;30(2):229-232.
doi: 10.1007/s00399-019-0616-0. Epub 2019 Apr 8.

How to maximize QRS narrowing

Olivia Braun  1 , Mate Vamos  1 , Julia W Erath  1 , Stefan H Hohnloser  2
Affiliations
Case Reports

How to maximize QRS narrowing

Olivia Braun et al. Herzschrittmacherther Elektrophysiol. 2019 Jun.

Abstract

Background: Cardiac resynchronization therapy (CRT) resulting in maximal QRS narrowing may be associated with improved outcomes.

Methods: Various atrioventricular (AV) delay settings, including the new SyncAV™ algorithm (St. Jude Medical/Abbott, St. Paul, MN, USA), aimed at maximal QRS narrowing were tested in an 81-year old CRT recipient.

Results: Maximal QRS narrowing from 160 to 100 ms was achieved with a manually programmed value of SyncAV™ -30 ms. At 2 months, the patient proved to be a CRT super-responder.

Conclusion: SyncAV™ algorithm is a new way for effective QRS narrowing with potentially improved outcomes.

Keywords: AV delay; Cardiac resynchronization therapy; Multipoint pacing; QRS narrowing; SyncAV™.

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