Abstract 179: Evaluation Of Coronary Artery Lesion In 9 Infantile Kawasaki Disease Patients Using 320row Area Detector Ct

Abstract

Introduction: Recent advances of CT technology have made it possible to obtain clear coronary artery lesion (CAL) image. However, high dose radiation exposure is inevitable. Also it becomes difficult to obtain adequate images when patient’s heart rate is high. Recently 320row area detector CT (ADCT) has been introduced. Using this device, clear coronary artery images are obtainable with low dose radiation exposure. Also it provides adequate image for high heart rate patients. However, there is few report which describe its utility for infantile patients. Aim: To evaluate the feasibility of 320row area detector CT for evaluation of CAL for infantile KD patients. Subjects and methods: Nine infants who have CAL due to KD have been evaluated. Mean age at examination was 30.5+/-22.0 (mean+/-SD) months, weight was 13.6+/-6.5 kg and mean time elapse from diagnosis of KD was 18.7+/-16.0 months. Patients were evaluated using ADCT and findings obtained were compared with either coronary angiography (CAG) or echocardiography. Radiation exposure dose were also explored. Results: All patients have accomplished examination and adequate images were obtained. Mean heart rate at examination was 105+/-27 bpm. Examinations were conducted to two patients with breath holding and others with spontaneous breathing. Compared with CAG and echocardiography, similar results were obtained. Mean effective radiation dose was 6.14+/-2.22 mSv. Conclusion: Infantile KD patient’s CALs were able to be evaluated by ADCT with relatively low dose radiation exposure, without breath holding. ADCT have contributed to reduce the need for repeated invasive CAG.