背景:医学干预措施向微创手术的发展突出了精确的术前评估的关键作用,特别是在心脏和心血管疾病的基于导管的治疗中。这项研究调查了创新技术,如二尖瓣环扎术(MLC)和经导管心肌内射频消融(TIRA),强调术前心脏CT扫描对于这些新兴治疗中准确解剖指导的重要性。
目的:本研究的目的是通过检查二尖瓣环扎的近端间隔静脉(ps)和经导管心肌内射频消融的远端间隔静脉(ds)来评估心动周期。
方法:纳入40例接受第三代双源CT(DSCT)评估胸痛的患者(平均年龄59.4±14.7岁)。CT扫描,利用碘帕醇和生理盐水的双能CT(DECT),包围了心底的隆突。在整个心动周期中以10%的间隔重建噪声优化的线性混合图像,两个放射科医生注意到每个阶段都存在ps和ds。
结果:这项研究确定了62.5%的患者中的ps和72.5%的ds,两者都出现在45%的病例中。间隔静脉的观察以ps的70、60、40、80、30、20和10%的顺序发生更频繁,DS为60、70、40、80、30、90、20和10%,分别。
结论:心脏成像中的DECT有助于评估间隔静脉频率。70%的相位对于MLC是最佳的,而TIRA优选60%阶段。
BACKGROUND: The advancement of medical interventions towards minimally invasive procedures highlights the crucial role of precise pre-procedural evaluation, particularly in catheter-based treatments for heart and cardiovascular conditions. This study investigates innovative techniques such as mitral loop cerclage (MLC) and transcatheter intramyocardial radiofrequency ablation (TIRA), emphasizing the importance of preprocedural cardiac CT scans for accurate anatomical guidance in these emerging therapies.
OBJECTIVE: The objective of this study was to assess the cardiac cycle through examination of the proximal septal
vein (ps) for mitral loop cerclage and the distal septal
vein (ds) for transcatheter intramyocardial radiofrequency ablation.
METHODS: Forty patients (mean age 59.4 ± 14.7 years) undergoing third-generation dual-source computed tomography (DSCT) for chest pain evaluation were enrolled. CT scans, utilizing dual-energy CT (DECT) with iopamidol and saline, encompassed the carina to the heart base. A noise-optimized linear blended image was reconstructed at 10% intervals throughout the cardiac cycle, and the presence of ps and ds in each phase was noted by two radiologists.
RESULTS: This study identified ps in 62.5% and ds in 72.5% of patients, with both present in 45% of cases. The observation of septal veins occurred more frequently in the sequence of 70, 60, 40, 80, 30, 20, and 10% for ps, and 60, 70, 40, 80, 30, 90, 20, and 10% for ds, respectively.
CONCLUSIONS: DECT in cardiac imaging is instrumental in assessing septal
vein frequency. The 70% phase is optimal for MLC, while the 60% phase is preferred for TIRA.