Precision of automated QRS duration measurement in patients treated with cardiac resynchronization therapy.
Casper Lund-AndersenHelen H PetersenChristian JønsBerit T PhilbertJacob Tfelt-HansenLene T SkovgaardJesper H SvendsenPublished in: Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing (2018)
Automated measurement of QRSd in patients with CRT shows low precision with limits of agreement of ± 17.5 and ± 28.8 ms for repeated measurements in two commercially available electrocardiographs. Device programming solely by QRSd changes should be done with caution, and clinical effects should be demonstrated in future trials. Device programming based on QRSd changes should be done with caution until the ability of this measure to predict clinical outcome can be demonstrated in prospective study.