open access

Vol 76, No 6 (2018)
Original articles
Published online: 2018-01-26
Submitted: 2017-10-24
Accepted: 2018-01-22
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Significant mitral regurgitation as a predictor of long-term prognosis in patients receiving cardiac resynchronisation therapy

Han Jin, Shengwen Yang, Wei Hua, Min Gu, Hongxia Niu, Ligang Ding, Jing Wang, Cong Xue, Shu Zhang
DOI: 10.5603/KP.a2018.0035
·
Kardiol Pol 2018;76(6):987-992.

open access

Vol 76, No 6 (2018)
Original articles
Published online: 2018-01-26
Submitted: 2017-10-24
Accepted: 2018-01-22

Abstract

Background: Cardiac resynchronisation therapy (CRT) has been shown to reduce functional mitral regurgitation, although the relationship between significant mitral regurgitation (SMR) and the clinical prognosis of CRT remains uncertain.

Aim: We sought to investigate the association of baseline SMR with long-term outcomes in patients undergoing CRT.

Methods: A total of 296 consecutive patients undergoing CRT were enrolled. SMR was quantified by colour Doppler in all patients at baseline and defined as level ≥ 3 on the severity scale. The primary endpoints included all-cause death, heart failure hospitalisation (HFH), and heart transplantation, and the secondary endpoints were response to CRT and New York Heart Association (NYHA) class III or IV six months after CRT implantation.

Results: The mean age was 59 ± 11 years, and 202 (68.2%) patients were male. Among all patients, 124 (41.9%) presented with baseline SMR. Over a mean follow-up of 4.17 ± 3.16 years, there were 53 (17.9%) cases of all-cause death, 41 (13.8%) cases of HFH, and four (1.4%) cases of heart transplantation. SMR was positively associated with primary endpoint events (hazard ratio [HR] 1.602, 95% confidence interval [CI] 1.083–2.371, p = 0.019), HFH (HR 3.567, 95% CI 1.763–7.219, p < 0.001) and NYHA class III or IV (HR 2.101, 95% CI 1.313–3.363, p = 0.002). After adjusting for multiple factors, we found that SMR (HR 1.785, 95% CI 1.091–2.920, p = 0.021), ischaemic heart disease (HR 1.628, 95% CI 1.062–2.494, p = 0.025), and the lack of use of spironolactone (HR 2.044, 95% CI 1.040–4.017, p = 0.038) were independent predictors of primary endpoints, and SMR remained an independent predictor of HFH (HR 4.622, 95% CI 1.955–10.923, p < 0.001).

Conclusions: Significant mitral regurgitation before CRT implantation was strongly associated with long-term poor progno­sis. SMR was positively associated with HFH rather than all-cause death and CRT response.

Abstract

Background: Cardiac resynchronisation therapy (CRT) has been shown to reduce functional mitral regurgitation, although the relationship between significant mitral regurgitation (SMR) and the clinical prognosis of CRT remains uncertain.

Aim: We sought to investigate the association of baseline SMR with long-term outcomes in patients undergoing CRT.

Methods: A total of 296 consecutive patients undergoing CRT were enrolled. SMR was quantified by colour Doppler in all patients at baseline and defined as level ≥ 3 on the severity scale. The primary endpoints included all-cause death, heart failure hospitalisation (HFH), and heart transplantation, and the secondary endpoints were response to CRT and New York Heart Association (NYHA) class III or IV six months after CRT implantation.

Results: The mean age was 59 ± 11 years, and 202 (68.2%) patients were male. Among all patients, 124 (41.9%) presented with baseline SMR. Over a mean follow-up of 4.17 ± 3.16 years, there were 53 (17.9%) cases of all-cause death, 41 (13.8%) cases of HFH, and four (1.4%) cases of heart transplantation. SMR was positively associated with primary endpoint events (hazard ratio [HR] 1.602, 95% confidence interval [CI] 1.083–2.371, p = 0.019), HFH (HR 3.567, 95% CI 1.763–7.219, p < 0.001) and NYHA class III or IV (HR 2.101, 95% CI 1.313–3.363, p = 0.002). After adjusting for multiple factors, we found that SMR (HR 1.785, 95% CI 1.091–2.920, p = 0.021), ischaemic heart disease (HR 1.628, 95% CI 1.062–2.494, p = 0.025), and the lack of use of spironolactone (HR 2.044, 95% CI 1.040–4.017, p = 0.038) were independent predictors of primary endpoints, and SMR remained an independent predictor of HFH (HR 4.622, 95% CI 1.955–10.923, p < 0.001).

Conclusions: Significant mitral regurgitation before CRT implantation was strongly associated with long-term poor progno­sis. SMR was positively associated with HFH rather than all-cause death and CRT response.

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Keywords

cardiac resynchronisation therapy, significant mitral regurgitation, heart failure

About this article
Title

Significant mitral regurgitation as a predictor of long-term prognosis in patients receiving cardiac resynchronisation therapy

Journal

Kardiologia Polska (Polish Heart Journal)

Issue

Vol 76, No 6 (2018)

Pages

987-992

Published online

2018-01-26

DOI

10.5603/KP.a2018.0035

Bibliographic record

Kardiol Pol 2018;76(6):987-992.

Keywords

cardiac resynchronisation therapy
significant mitral regurgitation
heart failure

Authors

Han Jin
Shengwen Yang
Wei Hua
Min Gu
Hongxia Niu
Ligang Ding
Jing Wang
Cong Xue
Shu Zhang

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