The Clinical Value of Nongated Dual-Source Computed Tomography in Atrial Fibrillation Catheter Ablation.
BACKGROUND
Using a high-pitch dual-source CT (DSCT), we aimed to quantify the amounts of contrast media, radiation doses, and image qualities in patients undergoing pulmonary vein (PV) isolation.


RESULTS
The study enrolled 60 patients who were randomly assigned in a 1: 1: 1 ratio to undergo ECG-gated 64-slice multidetector computed tomography (MDCT; group I, n = 20), ECG-gated 128-DSCT (group II, n = 20), and nongated 128-DSCT (group III, n = 20). The total amount of contrast media was lower in groups II and III compared with group I (I: 54.7 ± 5.6, II: 26.6 ± 2.7, and III: 28.7 ± 6.9 mL, P < 0.001). The CT dose index was lower in groups II and III compared with group I (I: 73.1 ± 5.2, II: 3.5 ± 0.1, and III: 3.7 ± 0.1 mGy, P < 0.001). The dose length product was lower in groups II and III compared with group I (I: 1154.8 ± 82.8, II: 75.4 ± 2.3, and III: 77.2 ± 1.9 mGy × cm, P < 0.001). The total CT effective radiation dose was lower in groups II and III compared with group I (I: 16.2 ± 1.2, II: 1.1 ± 0.1, and III: 1.1 ± 0.1 mSv, P < 0.001). The total CT scan duration was shorter in group III compared with groups I and II (I: 30.8 ± 2.2, II: 23.4 ± 3.6, and III: 16.0 ± 2.4 minutes, P < 0.001). There were no significant differences in quality for integrated electroanatomical mapping (EAM) and parameters associated with PV isolation among the 3 groups.


CONCLUSIONS
Nongated 128-DSCT provides sufficient image quality to allow integrated EAM while exposing the patient to less contrast media, lower radiation doses, and shorter CT scan durations.
Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, Yamagata, Japan.
Tadateru
T
Iwayama
Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, Yamagata, Japan.
Takanori
T
Arimoto
Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, Yamagata, Japan.
Daisuke
D
Ishigaki
Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, Yamagata, Japan.
Naoaki
N
Hashimoto
Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, Yamagata, Japan.
Y U
YU
Kumagai
Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, Yamagata, Japan.
Y O
YO
Koyama
Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, Yamagata, Japan.
Nobuyuki
N
Kiribayashi
Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, Yamagata, Japan.
Shunsuke
S
Netsu
Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, Yamagata, Japan.
Satoshi
S
Nishiyama
Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, Yamagata, Japan.
Hiroki
H
Takahashi
Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, Yamagata, Japan.
Tetsuro
T
Shishido
Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, Yamagata, Japan.
Takuya
T
Miyamoto
Division of Radiology, Yamagata University School of Medicine, Yamagata, Japan.
Toshimitsu
T
Sato
Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, Yamagata, Japan.
Tetsu
T
Watanabe
Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, Yamagata, Japan.
Isao
I
Kubota
D000200:Action Potentials; D000368:Aged; D001281:Atrial Fibrillation / Q000000981:diagnostic imaging* / Q000503:physiopathology / Q000601:surgery*; D055424:Cardiac-Gated Imaging Techniques; D017115:Catheter Ablation; D003287:Contrast Media / Q000008:administration & dosage; D004562:Electrocardiography; D022062:Electrophysiologic Techniques, Cardiac; D005260:Female; D006339:Heart Rate; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D061330:Multidetector Computed Tomography; D061214:Patient Safety; D011237:Predictive Value of Tests; D011667:Pulmonary Veins / Q000000981:diagnostic imaging* / Q000503:physiopathology / Q000601:surgery*; D011829:Radiation Dosage; D000069079:Radiation Exposure; D012307:Risk Factors; D013997:Time Factors; D016896:Treatment Outcome
D003287:Contrast Media
atrial fibrillation; catheter ablation; dual-source computed tomography; multidetector computed tomography