Alsaileek Ahmed, Alharthi Mohsen, Almallah Mouaz
King Abdulaziz Cardiac Center, National Guard Health Affairs, Riyadh, Saudi Arabia.
J Saudi Heart Assoc. 2011 Oct;23(4):245-7. doi: 10.1016/j.jsha.2011.05.005. Epub 2011 Jun 7.
Atrial fibrillation (AF) is the most common persistent arrhythmia. It is associated with wide range of cardiac clinical conditions. Because of variable duration of cardiac cycle resulting in reduced image quality, AF has been considered relative contraindication for performing coronary computed tomography angiography (CCTA). However, recent reports have suggested that newer dual source scanner with higher temporal resolution can be used in patients with AF (Oncel et al., 2007; Wolak et al., 2008; Rist et al., 2009). Image quality can be maintained if heart rate is lowered to less than 70 beats per minute. However, high heart rate can still be challenging. Mapping systolic phase with the use of absolute delay reconstruction algorithm has been shown to provide better image quality. In this article, we present a case of patient with chronic AF and in whom coronary examination was required before going to repair of aortic root dissection. CCTA, with the use of absolute delay reconstruction algorithm, provided diagnostic image quality of the coronary arteries.
心房颤动（AF）是最常见的持续性心律失常。它与多种心脏临床病症相关。由于心动周期持续时间可变导致图像质量下降，AF一直被视为进行冠状动脉计算机断层扫描血管造影（CCTA）的相对禁忌证。然而，最近的报告表明，具有更高时间分辨率的新型双源扫描仪可用于AF患者（Oncel等人，2007年；Wolak等人，2008年；Rist等人，2009年）。如果心率降低到每分钟少于70次，图像质量可以维持。然而，高心率仍然具有挑战性。已证明使用绝对延迟重建算法映射收缩期可提供更好的图像质量。在本文中，我们介绍了一例慢性AF患者的病例，该患者在进行主动脉根部夹层修复术前需要进行冠状动脉检查。使用绝对延迟重建算法的CCTA提供了冠状动脉的诊断图像质量。
