Circulation:二尖瓣主动脉狭窄患者术前左室重构不良,心功能受损,术后心力衰竭风险增加

2022-08-19 MedSci原创 MedSci原创

虽然BAV患者明显年轻,但与TAV患者相比,伴有BAV的孤立性重度AS患者术前左室功能较差,术后心力衰竭住院的风险增加。

伴有严重孤立性主动脉瓣狭窄(AS)的二尖瓣(BAV)和三尖瓣(TAV)患者不良心脏重构的差异及其对主动脉瓣置换术后预后的影响尚不明确。

近日,心血管领域权威杂志Circulation上发表了一篇研究文章,研究人员试图调查BAV和TAV合并严重孤立性AS患者术前舒张和收缩功能的差异,以及术后心力衰竭发生率、住院率和死亡率。

该研究前瞻性地纳入了271例BAV(152例)或TAV(119例)的严重孤立性AS患者,无冠状动脉疾病或其他心脏瓣膜疾病,计划接受主动脉瓣置换术。术前超声心动图全面评估左室舒张、收缩功能。在平均1260天的前瞻性随访中记录了心衰事件,而BAV或TAV患者分别为1441天。

BAV患者伴有更明显的左室肥厚,且左室质量指数显著升高([LVMi]134g/m2 vs. 104g/m2,P<0.001),左室舒张功能障碍发生率更高(72% vs. 44%,P<0.001),左室射血分数降低(55% vs. 60%,P<0.001),整体纵向应变显著受损(P<0.001),NT-proBNP水平显著升高(P=0.007),术前左西孟旦治疗的发生率高于TAV患者(P<0.001)。BAV和TAV患者LVMi均与舒张功能障碍相关。主动脉瓣形态与LVMi对左室射血分数有显著交互作用,提示BAV患者LVMi与左室射血分数有显著相关性,TAV患者LVMi与左室射血分数无相关性。BAV患者术后需要更多的肌力支持治疗(P<0.001)。与TAV患者相比,BAV患者术后心力衰竭入院的累积发生率更高(主动脉瓣置换术后6年,分别为28.2%和10.6%,log-rankP=0.004)。BAV和TAV患者的生存率无差异(log-rankP=0.165)。

由此可见,虽然BAV患者明显年轻,但与TAV患者相比,伴有BAV的孤立性重度AS患者术前左室功能较差,术后心力衰竭住院的风险增加。该研究的结果表明,BAV合并AS的患者可能受益于更密切的监测和可能的早期干预。

原始出处:

Johan O. Wedin,et al.Patients With Bicuspid Aortic Stenosis Demonstrate Adverse Left Ventricular Remodeling and Impaired Cardiac Function Before Surgery With Increased Risk of Postoperative Heart Failure.Circulation.2022.https://www.ahajournals.org/doi/10.1161/CIRCULATIONAHA.122.060125

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    2022-08-20 wwzzly
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