Abstract
Background: Traditional radiography angles do not adequately reveal the shape and position of the right ventricular pacing electrode.
Objective: This study aimed to explore better radiography angles with the help of cardiac computed tomography (CT).
Methods: We analyzed the cardiac CT images of consecutive outpatients from 2018 to 2019. The right anterior oblique (RAO) 30° and the left anterior oblique (LAO) 40° were found to sufficiently display the shape and position of the right ventricular pacing electrode.
Results: A total of 214 consecutive outpatients were enrolled, whose average age was 55.0 ± 13.0 years, and 151 were male (70.6%). Through analyzing the cardiac CT images, the α angle (33.7° ± 6.1) and the γ angle (38.8° ± 8.0) were determined. Furthermore, we verified these angles in 48 patients after pacemaker implantation. The results showed that the ratio of the length of right ventricular electrode using the RAO α angle (≈30°) to the posterior-anterior position (PA position) was 1.099 ± 0.157 vs. 1.053 ± 0.182 (the ratio using the traditional RAO 45°) (P < 0.001). We observed that the relationship between the right ventricular active electrode and the ventricular septum was better identified using the LAO γ angle (≈40°) than the traditional 60° angle.
Conclusion: With the help of cardiac CT, we found that RAO 30° could better show the shape and length of the right ventricular pacing electrode, and LAO 40° could better show the positional relationship between the pacing electrode and the ventricular septum.
Graphical Abstract
[http://dx.doi.org/10.1148/radiographics.6.3.3317544] [PMID: 3317544]
[http://dx.doi.org/10.1097/RTI.0000000000000304] [PMID: 29065008]
[http://dx.doi.org/10.1007/s10840-020-00729-7] [PMID: 32219588]
[http://dx.doi.org/10.1016/j.jacep.2019.07.018] [PMID: 31857043]
[http://dx.doi.org/10.1016/j.hrthm.2019.01.008] [PMID: 30633981]
[http://dx.doi.org/10.1136/bmjopen-2020-046782] [PMID: 34039576]
[http://dx.doi.org/10.1007/s10554-017-1120-4] [PMID: 28357725]
[http://dx.doi.org/10.1111/pace.12817] [PMID: 26769293]
[http://dx.doi.org/10.1093/europace/euu323] [PMID: 25480941]
[http://dx.doi.org/10.1111/pace.12301] [PMID: 24215477]
[http://dx.doi.org/10.1093/europace/euv410] [PMID: 26847075]
[http://dx.doi.org/10.1111/pace.14229] [PMID: 33786829]
[http://dx.doi.org/10.1093/europace/euw074] [PMID: 27353321]
[http://dx.doi.org/10.1016/j.amjcard.2006.07.086] [PMID: 17223425]
[http://dx.doi.org/10.1093/eurheartj/ehm034] [PMID: 17426079]
[http://dx.doi.org/10.1111/jce.13256] [PMID: 28543771]
[http://dx.doi.org/10.1111/pace.14056]
[http://dx.doi.org/10.1161/CIR.0000000000000628] [PMID: 30586772]
[http://dx.doi.org/10.1080/17434440.2021.1866543] [PMID: 33336616]
[http://dx.doi.org/10.1016/j.jvc.2019.01.001] [PMID: 30792165]
[http://dx.doi.org/10.1007/s10840-010-9497-1] [PMID: 20556496]
[http://dx.doi.org/10.1007/s10840-011-9586-9] [PMID: 21584784]