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Mitral Annular Tissue Velocity Predicts Survival in Patients With Primary Mitral Regurgitation

  • You-Jung Choi (Division of Cardiology, Department of Internal Medicine, Korea University Guro Hospital, Korea University College of Medicine) ;
  • Chan Soon Park (Division of Cardiology, Department of Internal Medicine, Seoul National University Hospital) ;
  • Tae-Min Rhee (Department of Internal Medicine, Seoul National University College of Medicine) ;
  • Hyun-Jung Lee (Department of Internal Medicine, Seoul National University College of Medicine) ;
  • Hong-Mi Choi (Department of Internal Medicine, Seoul National University College of Medicine) ;
  • In-Chang Hwang (Department of Internal Medicine, Seoul National University College of Medicine) ;
  • Jun-Bean Park (Department of Internal Medicine, Seoul National University College of Medicine) ;
  • Yeonyee E. Yoon (Department of Internal Medicine, Seoul National University College of Medicine) ;
  • Jin Oh Na (Division of Cardiology, Department of Internal Medicine, Korea University Guro Hospital, Korea University College of Medicine) ;
  • Hyung-Kwan Kim (Department of Internal Medicine, Seoul National University College of Medicine) ;
  • Yong-Jin Kim (Department of Internal Medicine, Seoul National University College of Medicine) ;
  • Goo-Yeong Cho (Department of Internal Medicine, Seoul National University College of Medicine) ;
  • Dae-Won Sohn (Department of Internal Medicine, Seoul National University College of Medicine) ;
  • Seung-Pyo Lee (Department of Internal Medicine, Seoul National University College of Medicine)
  • 투고 : 2023.11.03
  • 심사 : 2024.03.11
  • 발행 : 2024.06.01

초록

Background and Objectives: Early diastolic mitral annular tissue (e') velocity is a commonly used marker of left ventricular (LV) diastolic function. This study aimed to investigate the prognostic implications of e' velocity in patients with mitral regurgitation (MR). Methods: This retrospective cohort study included 1,536 consecutive patients aged <65 years with moderate or severe chronic primary MR diagnosed between 2009 and 2018. The primary and secondary outcomes were all-cause and cardiovascular mortality, respectively. According to the current guidelines, the cut-off value of e' velocity was defined as 7 cm/s. Results: A total of 404 individuals were enrolled (median age, 51.0 years; 64.1% male; 47.8% severe MR). During a median 6.0-year follow-up, there were 40 all-cause mortality and 16 cardiovascular deaths. Multivariate analysis revealed a significant association between e' velocity and all-cause death (adjusted hazard ratio [aHR], 0.770; 95% confidence interval [CI], 0.634-0.935; p=0.008) and cardiovascular death (aHR, 0.690; 95% CI, 0.477-0.998; p=0.049). Abnormal e' velocity (≤7 cm/s) independently predicted all-cause death (aHR, 2.467; 95% CI, 1.170-5.200; p=0.018) and cardiovascular death (aHR, 5.021; 95% CI, 1.189-21.211; p=0.028), regardless of symptoms, LV dimension and ejection fraction. Subgroup analysis according to sex, MR severity, mitral valve replacement/repair, and symptoms, showed no significant interactions. Including e' velocity in the 10-year risk score improved reclassification for mortality (net reclassification improvement [NRI], 0.154; 95% CI, 0.308-0.910; p<0.001) and cardiovascular death (NRI, 1.018; 95% CI, 0.680-1.356; p<0.001). Conclusions: In patients aged <65 years with primary MR, e' velocity served as an independent predictor of all-cause and cardiovascular deaths.

키워드

과제정보

The authors thank Professor Soon Young Hwang (Korea University Medical Center and Korea University Guro Hospital) for her expert advice on statistical assessments.

참고문헌

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