Accuracy of Anatomical Evaluation by Cardiac Non-Contrast Computed Tomography in CRT Implantation

Abstract

Knowing the anatomy of the coronary vein（CV）and left phrenic nerve（LPN） is important for successful LV lead implantation. The aim of this study was to evaluate the accuracy of three-dimensional（3D）cardiac non-contrast computed tomography. We included 20 cases in this study. 3D image of CV was compared with intraoperative CV venogram, and accuracy of 3D image of LPN was assessed by checking if the site of phrenic nerve stimulation equaled 3D image of LPN. 3D image of CV was same as CV venogram in 19/20 cases. Phrenic nerve stimulation was observed in 10 cases, and 3D image of LPN matched as the site of phrenic nerve stimulation. As a result, we concluded that anatomical evaluation by cardiac non-contrast computed tomography is accurate. When we implant a CRT device, 3D image of CV and LPN constructed from non-contrast CT are usable tools through which we can obtain anatomical information before CRT implantation.