The measurement accuracy of right coronary artery during coronary angiography at 45Gdegree left oblique position / 实用放射学杂志

ABSTRACT

Objective To explore the measurement accuracy of right coronary artery during coronary angiography (CAG)at 45Gdegree left oblique position.Methods The images of right coronary artery angiographic view of 45Gdegree left oblique position were divided into nine average areas.The images with marker segment of guiding wire located in the central area (n＝45)or subcentral area (n＝45)of CAG cases were collected retrospectively and randomly.The marker segment was measured by catheter calibration method,and the measure values were compared with the actual length (30 mm).Results A N OVA analysis suggested statistical differences among the three groups (F＝4.59,P＜0.05).By paired comparison,no significant differences were found in measured values between central areas (3 1.1 9± 4.12)mm or subcentral areas (29.55±2.75)mm and the actual length (P＞0.05).Significant differences were found in measured values between central areas and subcentral areas (P＜0.05).The measuring error of subcentral areas (－1.5%)was less than that of central areas (3.9%).Conclusion During CAG at 45Gdegree left oblique position,the values of subcentral area were more accurate than those of central area and the subcentral area was thus regarded as image area with less measurement error in interventional surgery.