体积流失对严重大动脉狭窄的生存的影响
Sara L Hungerford1, Ning Song2, Brandon Loo3
1The CardioVascular Center Tufts, Boston, Massachusetts, USA; Faculty of Medicine and Health, University of Sydney, Sydney Australia; Department of Cardiology, Royal North Shore Hospital, Sydney, Australia.
JACC. Asia
|August 27, 2025
概括
在TAVR后,大动脉狭窄患者的体积流量 (V- Q) 异调提供了比目前的测量更好的生存预测. 这一发现突出了严重AS管理的新预后标志.
科学领域:
- 心脏病学
- 医学成像
- 生物医学工程
背景情况:
- 在大动脉狭窄 (AS) 中,当前流量 (Q) 的评估依赖于基于体积的中风体积指数 (SVi).
- 冲击体积指数 (SVi) 与流量 (Q) 基本不同,定义为单位时间的体积.
- 这种区分对于精确的血动力学评估至关重要.
研究的目的:
- 评估严重AS患者体积流量 (V- Q) 不一致的预后意义.
- 专注于通过导管进行大动脉置换的患者.
- 将V-Q异常与现有的预后标志物进行比较.
主要方法:
- 这项研究包括291名65岁以上接受TAVR治疗的患者.
- 通过多普勒回声心脏成像评估大动脉流量;计算过大动脉流量 (TFR).
- 定义的低V-Q异调 (SVi<35 mL/m2,TFR>210 mL/s) 和正常的V-Q异调 (SVi>35 mL/m2,TFR<210 mL/s).
主要成果:
- 在29%的患者中观察到V- Q异调 (15%低,14%正常).
- 较低的V-Q异调与改善的3年生存率相关 (86. 0% vs 73. 8%).
- 与SVi或TFR值相比,V- Q异常显示出更强的生存预测.
结论:
- 在TAVR后,近三分之一的AS患者患有体积流量 (V- Q) 不一致.
- 与现有的SVi和TFR值相比,V-Q异常具有更高的预后价值.
- 这突出了一个新的,更准确的预后标志.
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