Circulation Journal
Online ISSN : 1347-4820
Print ISSN : 1346-9843
ISSN-L : 1346-9843
Clinical Investigation
ECG-Edit Function in Multidetector-Row Computed Tomography Coronary Arteriography for Patients With Arrhythmias
Hideyuki MatsutaniTomonari SanoTakeshi KondoHitomi MoritaTakehiro AraiTakako SekineShinichi TakaseAkitsugu OidaHiroshi FukazawaMasahiko SugutaMakoto KondoTakahide KodamaTadaaki OriharaNorikazu YamadaMasaharu TsuyukiJagat Narula
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2008 Volume 72 Issue 7 Pages 1071-1078


Background ECG-gating is necessary for cardiac computed tomography, but is not suitable for arrhythmias, so the aim of this study was to evaluate the usefulness of the ECG-edit function for this purpose. Methods and Results Of 1,221 patients undergoing 64-row multidetector-row computed tomography coronary angiography (coronary MDCT), 123 patients (28 atrial fibrillation (Af), 39 premature atrial contractions (PAC), 42 premature ventricular contractions (PVC), 3 PAC + PVC, 10 sinus arrhythmias (SA), and a second-degree atrioventricular block (2°AVB)) had arrhythmias necessitating the ECG-edit function. Short R-R interval was deleted and mid-diastolic phases were selected from the long R-R intervals using the "R+absolute time" method. In the present study, the reconstructed images were evaluated using a triple-grade scale A-C, representing excellent, acceptable, and unacceptable image quality. Image quality, categorized as A, B and C, respectively, was 50%, 36% and 14% for the 28 patients with Af; 56%, 36% and 8% for the 39 PAC patients, and 65%, 33% and 2% in the 42 PVC patients. None of the scans of the PAC + PVC, SA, and 2°AVB patients was ranked as C. Conclusions The ECG-edit function is useful for reconstructing coronary MDCT images in many arrhythmias, and provides clinically acceptable images in most cases. (Circ J 2008; 72: 1071 - 1078)

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