Lewisham and Greenwich NHS Trust, London, UK.
Lewisham and Greenwich NHS Trust, London, UK and St George's University Hospitals NHS Trust, London, UK.
Clin Med (Lond). 2021 Mar;21(2):90-95. doi: 10.7861/clinmed.2020-0691.
The National Institute for Health and Care Excellence (NICE) 2016 guidelines (CG95) recommend patients with new stable chest pain be investigated with computed tomography coronary angiography (CTCA). An updated guideline (MTG32) recommended using CT fractional flow reserve (CTFFR) as a gatekeeper to invasive coronary angiography (ICA) for patients with coronary stenosis on CTCA. Subsequently, NHS England negotiated a UK-wide contract with HeartFlow, the provider of CTFFR. We describe our experience with CTFFR and consider the impact of the recent ISCHEMIA trial on these guidelines.
We prospectively collected ICA and revascularisation data on all patients undergoing CTFFR from January 2019 to March 2020.
One-hundred and twenty-five of 140 patients completed CTFFR analysis. Eighty-one patients had CTCA stenosis >50%. Thirty-six had positive CTFFR; 29 underwent ICA with 22 (75.9%) revascularised. Forty-five had negative CTFFR; 14 underwent ICA and four (28.6%) were revascularised. The average cost of investigation per patient (PP) was £971.95. Had these patients undergone ICA directly with no functional test after CTCA, the average cost would be £932.51 PP.
Our revascularisation rates suggest that CTFFR can potentially be a gatekeeper to ICA but does not necessarily yield cost savings.
国家卫生与保健卓越研究所(NICE)2016 年指南(CG95)建议对新发稳定型胸痛患者进行计算机断层扫描冠状动脉造影(CTCA)检查。一项更新的指南(MTG32)建议对 CTCA 检查显示冠状动脉狭窄的患者使用 CT 血流储备分数(CTFFR)作为侵入性冠状动脉造影(ICA)的门控检测。随后,NHS 英格兰与 HeartFlow 公司(CTFFR 的提供商)就英国范围内的合同进行了谈判。我们描述了 CTFFR 的使用经验,并考虑了最近 ISCHEMIA 试验对这些指南的影响。
我们前瞻性地收集了所有在 2019 年 1 月至 2020 年 3 月期间接受 CTFFR 检查的患者的 ICA 和血运重建数据。
在 140 名接受 CTFFR 分析的患者中,有 125 名完成了检查。81 名患者 CTCA 狭窄程度>50%。36 名患者 CTFFR 阳性;29 名患者接受了 ICA,其中 22 名(75.9%)进行了血运重建。45 名患者 CTFFR 阴性;14 名患者接受了 ICA,其中 4 名(28.6%)进行了血运重建。每位患者的平均检查费用(PP)为 971.95 英镑。如果这些患者在 CTCA 后直接进行 ICA 检查而不进行功能检查,平均检查费用将为每位患者 932.51 英镑。
我们的血运重建率表明,CTFFR 可能是 ICA 的门控检测方法,但不一定能节省成本。