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ECG-edit function in multidetector-row computed tomography coronary arteriography for patients with arrhythmias.

  • Author(s): Matsutani, Hideyuki;
  • Sano, Tomonari;
  • Kondo, Takeshi;
  • Morita, Hitomi;
  • Arai, Takehiro;
  • Sekine, Takako;
  • Takase, Shinichi;
  • Oida, Akitsugu;
  • Fukazawa, Hiroshi;
  • Suguta, Masahiko;
  • Kondo, Makoto;
  • Kodama, Takahide;
  • Orihara, Tadaaki;
  • Yamada, Norikazu;
  • Tsuyuki, Masaharu;
  • Narula, Jagat
  • et al.
Abstract

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.

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 degrees 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 degrees AVB patients was ranked as C.

The ECG-edit function is useful for reconstructing coronary MDCT images in many arrhythmias, and provides clinically acceptable images in most cases.

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