天津医药 ›› 2026, Vol. 54 ›› Issue (10): 1093-1098.doi: 10.11958/20261200

• 应用研究 • 上一篇    下一篇

肺动脉高压患者左心室几何重构特征与临床恶化的关系

邓瑗琳1(), 田赫先1, 张璋1, 杨振文2, 李锋坦1, 李东1, 杨帆1,△()   

  1. 1 天津医科大学总医院医学影像科 (邮编 300052)
    2 天津医科大学总医院心血管内科 (邮编 300052)
  • 收稿日期:2026-05-07 修回日期:2026-07-10 出版日期:2026-10-15 发布日期:2026-10-10
  • 通讯作者: △E-mail:dr_yangfan0201@163.com
  • 作者简介:邓瑗琳(1996),女,技师,主要从事心脏磁共振方面研究。E-mail:deng_yuanlin@126.com
  • 基金资助:
    国家自然科学基金面上项目(82471927);国家自然科学基金面上项目(82271937)

The relationship between the left ventricular geometric remodeling and clinical worsening in patients with pulmonary arterial hypertension

DENG Yuanlin1(), TIAN Hexian1, ZHANG Zhang1, YANG Zhenwen2, LI Fengtan1, LI Dong1, YANG Fan1,△()   

  1. 1 Department of Radiology, Tianjin Medical University General Hospital, Tianjin 300052, China
    2 Department of Cardiology, Tianjin Medical University General Hospital, Tianjin 300052, China
  • Received:2026-05-07 Revised:2026-07-10 Published:2026-10-15 Online:2026-10-10
  • Contact: △E-mail:dr_yangfan0201@163.com

摘要:

目的 探讨心脏磁共振(CMR)短轴电影影像提取的左心室几何重构特征与肺动脉高压(PH)患者临床恶化(CW)的关系。方法 回顾性纳入经右心导管确诊并完成CMR检查的PH患者194例,根据随访期间是否发生CW分为CW组(61例)和非CW组(133例)。基于舒张末期(ED)和收缩末期(ES)短轴影像,提取左心室偏心率、圆形度和轴比,并构建左心室几何指数(LVGI)。采用Cox回归分析LVGI与CW的关系,采用Harrell C-index及60个月时间依赖受试者工作特征(ROC)曲线及Kaplan-Meier曲线评价LVGI对预后的区分能力。采用Spearman相关分析LVGI与主要血流动力学及CMR心功能参数之间的相关性。结果 与非CW组相比,CW组ED和ES左心室偏心率及轴比升高,圆形度降低,LVGI均显著升高(均P<0.05)。单因素Cox回归结果显示,ED LVGI是临床恶化的影响因素(HR=1.684,95%CI:1.353~2.107,P<0.001)。多因素Cox回归分析显示,ED LVGI仍是CW的影响因素(HR=1.370,95%CI:1.028~1.827,P=0.032)。ED LVGI的60个月时间依赖ROC曲线下面积(AUC)为0.690,Harrell C-index为0.663。Spearman相关分析显示,ED LVGI与平均肺动脉压、肺血管阻力及右心室舒张末期容积指数呈正相关(rs分别为0.436、0.421、0.399),与右心室射血分数和左心室心脏指数呈负相关(rs分别为-0.247、-0.227)。基于ED LVGI中位数分组后,高LVGI组CW事件发生率高于低LVGI组(P<0.001)。结论 PH患者发生CW时存在更明显的左心室几何重构。基于CMR构建的ED LVGI与CW独立相关,可作为反映心室相互作用和疾病进展的补充性影像指标。

关键词: 肺动脉高压, 磁共振成像, 心室重构, 心室功能, 疾病进展

Abstract:

Objective To investigate the association between left ventricular (LV) geometric remodeling derived from short-axis cine cardiac magnetic resonance (CMR) images and clinical worsening (CW) in patients with pulmonary hypertension (PH). Methods A total of 194 patients with PH confirmed by right heart catheterization and who underwent CMR were retrospectively included. Patients were divided into the CW group (n=61) and the non-CW group (n=133) based on follow-up outcome. LV eccentricity, circularity and axis ratio were measured from short-axis cine CMR images at end-diastole (ED) and end-systole (ES). A composite left ventricular geometric index (LVGI) was subsequently constructed. Differences in geometric indices between the two groups were compared. Cox regression was used to evaluate the association between LVGI and clinical worsening. Prognostic discrimination was assessed using the Harrell C-index, 60-month time-dependent receiver operating characteristic (ROC) analysis and Kaplan-Meier analysis. In addition, Spearman correlation analysis was performed to assess the association of LVGI with selected hemodynamic and CMR-derived cardiac functional parameters. Results Compared with the non-CW group, the LV eccentricity and long-to-short axis ratio increased and circularity decreased at both ED and ES in the CW group (all P<0.05). After integration of these geometric parameters, both ED and ES LVGI were significantly higher in the CW group (both P<0.05). In univariable Cox analysis, ED LVGI was significantly associated with clinical worsening (HR=1.684, 95%CI: 1.353-2.107, P<0.001). After multivariable adjustment, ED LVGI remained independently associated with clinical worsening (HR=1.370, 95%CI: 1.028-1.827, P=0.032). The 60-month time-dependent AUC of ED LVGI for predicting clinical worsening was 0.690, and the Harrell C-index was 0.663.Spearman correlation analysis showed that ED LVGI was positively correlated with mean pulmonary arterial pressure, pulmonary vascular resistance and right ventricular end-diastolic volume index (rs=0.436, 0.421, and 0.399, respectively), and negatively correlated with right ventricular ejection fraction and left ventricular cardiac index (rs=-0.247 and -0.227, respectively). After stratification by the median ED LVGI, the clinical-worsening-free survival was higher in the high-LVGI group than that of the low-LVGI group (Log-rank P<0.001). Conclusion LV geometric remodeling is more pronounced in PH patients with clinical worsening. CMR-derived ED LVGI is independently associated with CW and may serve as a complementary imaging marker reflecting ventricular interaction and disease progression.

Key words: pulmonary arterial hypertension, magnetic resonance imaging, ventricular remodeling, ventricular function, disease progression

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