功能性三尖瓣关闭不全
继发于右心室扩大和/或三尖瓣环扩大及瓣叶系连的三尖瓣关闭不全,瓣叶无内在结构性改变。
定义
在解剖结构正常的三尖瓣叶存在收缩期系连及对合面积丧失的情况下,由于右心室扩大和功能不全和/或三尖瓣环扩大(继发于肺动脉高压、右心室压力/容量负荷过重或心房/心室心肌病)所致的三尖瓣反流 [V1] [V3] [G23-01] [G23-02]。
严重程度标准
- 轻度(L):缩流颈(VC)< 3 mm;PISA半径 ≤ 5 mm(在奈奎斯特基线位移速度 28 cm/s 下);有效反流孔面积(EROA)< 0.20 cm²;反流容积(RV)< 30 mL/次;连续波多普勒:微弱或不完整射流;肝静脉收缩期前向血流保留 [V1] [V3] [G23-01] [G23-02]。
- 中度(M):VC 3.0–6.9 mm;PISA半径 6–9 mm;EROA 0.20–0.39 cm²;RV 30–44 mL/次;连续波多普勒:致密抛物线状射流;肝静脉收缩期前向血流减弱平钝 [V1] [V3] [G23-01] [G23-02]。
- 重度(G):VC ≥ 7.0 mm;PISA半径 > 9 mm;EROA ≥ 0.40 cm²;RV ≥ 45 mL/次;肝静脉出现收缩期血流逆转;连续波多普勒:因RV-RA压力迅速均等出现早期达峰的致密三角形全收缩期信号(v波截断征)[V1] [V3] [G23-01] [G23-02]。(临床提示:当代 5 级分类法还包括极重度伴VC ≥ 14 mm,EROA ≥ 0.60 cm²,以及特重度伴VC ≥ 21 mm,EROA ≥ 0.80 cm² [G23-01])。
分层表现
模拟器严重程度分级
模拟器严重程度分级:
轻度, 中度, 重度
基线心律:
正常窦性心律
亦称为: 功能性三尖瓣关闭不全 · 继发性三尖瓣关闭不全 · 三尖瓣反流 · 功能性TR · TR
该组中的其他病变
文献来源
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