PDF(Pubmed)
Abstract：
Implantable cardiac monitors (ICMs) primarily use R-R intervals in subcutaneous electrocardiograms (ECGs) to detect arrhythmias. Therefore, reliable detection of R-wave amplitude by an ICM is vital. Since ICMs detect subcutaneous ECGs, the impact of the implantation depth should be assessed.
This study investigated the influence of ICM depth on R-wave (ICM-R) amplitude on an ECG generated by an ICM (JOT Dx; Abbott). Overall, 58 patients who underwent ICM implantation at Kamagaya General Hospital from May 2022 to April 2023 were retrospectively reviewed. The depth-position was measured using ultrasound imaging after implantation. The depth of the ICM did not show any correlation with ICM-R amplitude (r = -.0141, p = .294). However, the distance between the ICM and the heart surface showed a significant correlation with ICM-R amplitude (r = -.581, p < .001). Body weight (r = -.0283, p = .033) and body mass index (r = -.0342, p = .009) were associated with ICM-R amplitude. S wave in the V1 -lead was also associated with ICM-R amplitude (r = .481, p < .001). After multivariate analysis, the distance between the ICM and heart surface and the S wave in V1 were independent determinants for the ICM-R amplitude.
The ICM-R amplitude may be higher with the ICM implanted deeper.
This study investigated the influence of ICM depth on R-wave (ICM-R) amplitude on an ECG generated by an ICM (JOT Dx; Abbott). Overall, 58 patients who underwent ICM implantation at Kamagaya General Hospital from May 2022 to April 2023 were retrospectively reviewed. The depth-position was measured using ultrasound imaging after implantation. The depth of the ICM did not show any correlation with ICM-R amplitude (r = -.0141, p = .294). However, the distance between the ICM and the heart surface showed a significant correlation with ICM-R amplitude (r = -.581, p < .001). Body weight (r = -.0283, p = .033) and body mass index (r = -.0342, p = .009) were associated with ICM-R amplitude. S wave in the V1 -lead was also associated with ICM-R amplitude (r = .481, p < .001). After multivariate analysis, the distance between the ICM and heart surface and the S wave in V1 were independent determinants for the ICM-R amplitude.
The ICM-R amplitude may be higher with the ICM implanted deeper.
摘要：
背景：植入式心脏监护仪（ICM）主要使用皮下心电图（ECG）中的R-R间隔来检测心律失常。因此,ICM对R波振幅的可靠检测至关重要。由于ICM检测到皮下心电图，应评估植入深度的影响.
结果：本研究调查了ICM深度对ICM（JOTDx；Abbott）产生的ECG的R波（ICM-R）振幅的影响。总的来说,对2022年5月至2023年4月在Kamagaya总医院接受ICM植入的53例患者进行回顾性分析。植入后使用超声成像测量深度位置。ICM的深度与ICM-R振幅没有显示任何相关性(r=-.0141,p=.294)。然而,ICM与心脏表面之间的距离与ICM-R振幅显着相关（r=-.581，p<.001）。体重（r=-.0283，p=.033）和体重指数（r=-.0342，p=.009）与ICM-R振幅相关。V1-导联中的S波也与ICM-R振幅相关(r=.481,p<.001)。经过多变量分析，ICM与心脏表面之间的距离以及V1中的S波是ICM-R振幅的独立决定因素。
结论：ICM植入越深，ICM-R振幅可能越高。
结果：本研究调查了ICM深度对ICM（JOTDx；Abbott）产生的ECG的R波（ICM-R）振幅的影响。总的来说,对2022年5月至2023年4月在Kamagaya总医院接受ICM植入的53例患者进行回顾性分析。植入后使用超声成像测量深度位置。ICM的深度与ICM-R振幅没有显示任何相关性(r=-.0141,p=.294)。然而,ICM与心脏表面之间的距离与ICM-R振幅显着相关（r=-.581，p<.001）。体重（r=-.0283，p=.033）和体重指数（r=-.0342，p=.009）与ICM-R振幅相关。V1-导联中的S波也与ICM-R振幅相关(r=.481,p<.001)。经过多变量分析，ICM与心脏表面之间的距离以及V1中的S波是ICM-R振幅的独立决定因素。
结论：ICM植入越深，ICM-R振幅可能越高。
