Clinical safety of cardiac resynchronization therapy and implantable cardiac defibrillator implantation compatible with magnetic resonance imaging
Li Qiaoyuan
Xiang Meixiang
Su Yangang
Dai Wenlong
He Dongfang
Fang Dongping
Guo Chengjun
Abstract：Objective To observe the safety of magnetic resonance imaging (MRI)-conditional cardiac resynchronization therapy,implantable cardiac defibrillator(CRT-D) implantation and postoperative MRI performance.Methods From December 2017 to March 2018,12 heart failure patients with poor response to medication therapy were implanted MRI-conditional CRT-D (Inventra 7 HF-T QP).Pacemaker parameters were observed during implantation,1 month after operation,before MRI scanning and 1,3 months after MRI examination.Results There were 7 males and 5 females.MRI was performed in 10 cases(83.3％).There were no significant changes of CRT-D electrical parameters during implantation,1 month after operation,before and 1,3 months after MRI scanning(all P＞0.05).The variations of electrical parameters at 1 month after MRI were (51 ± 31)Ω for right atrial impedance,(116 ± 90) Ω for left ventricular impedance,(26 ± 4) Ω for right ventricular impedance and (5.6 ± 2.1)Ω for defibrillation impedance.Three cases showed slight artifacts in MRI which did not affect diagnosis,while 1 case had severe artifact around the heart that hindered image reading.No threshold increasing,sensation abnormality and lead dislodgment,myocardium perforation were observed.Conclusion MRI-conditional CRT-D pacemaker is feasible and MRI scanning can be performed safely after implantation.
Keywords：Magnetic resonance imagingCardiac resynchronization therapy and implantable cardiac defibrillatorMagnetic resonance imaging-conditional pacemaker
Publication Date：2020-01-08
Online Publishing Date：2026-09-14(First online date of this platform, not the publication date of the document)
Pages：4( 30-33 )