Predictive values of radiology algorithm that was developed by two dimensional echocardiography in identifying the site of Leads

VernacularTitle:超声评价影像流程图预测右室起搏电极间隔定位的价值
Author: Xiaogang LIU ; Dongyan WU ; Jing XU
Publication Type:Journal Article
Keywords: ventricular septum; cardiac pacing,artificial; echocardiography; fluoroscopy; radiology algorithm
From: Tianjin Medical Journal 2015;(6):677-680
CountryChina
Language:Chinese
Abstract: Objective To develop a radiology algorithm and test its the accuracy in distinguish pacing in the septum from the other parts. Methods One hundred patients were implanted with double-chamber pacemakers. Sites of the leads were verified by two-dimensional echocardiography, and the patients were divided into 4 groups according to the echocar?diography:septal right ventricular outflow tract group(RVOT), RVOT anterior free wall group, mid septum group, and anteri?or septum group (near to the anterior free wall ). An algorithm was developed according to radiological characteristics in the 45° left anterior oblique (LAO45° ) view and the 30° right anterior oblique (RAO30° ) view. Then its sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) were tested . Results The algorithm has high sensitivi?ty and specificity, which were 90%and 97%respectively. The positive predictive value and negative predictive value were 90% and 97% respectively. Conclusion The radiology algorithm we developed have a high sensitivity and specificity in identifying the site of the leads.