Myocardial function in cardiac resynchronization therapy and factors significant for its improvement
- Authors: Rimskaya E.M.1, Dobrovolskaya S.Е.1, Tarasovskiy G.S.1, Kashtanova S.Y.1, Shitov V.N.1, Slobodyanik V.V.2, Mironova N.A.1, Saidova M.A.1, Golitsyn S.P.1
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Affiliations:
- Chazov National Medical Research Center of Cardiology
- Academician Shumakov National Medical Research Center of Transplantology and Artificial Organs
- Issue: Vol 97, No 4 (2025): Вопросы диагностики
- Pages: 306-314
- Section: Original articles
- URL: https://journals.rcsi.science/0040-3660/article/view/292174
- DOI: https://doi.org/10.26442/00403660.2025.04.203148
- ID: 292174
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Abstract
Aim. To analyze myocardial work in cardiac resynchronization therapy (CRT) and to determine the factors influence its positive dynamics.
Materials and methods. Global longitudinal strain (GLS) and myocardial work parameters including global constructive work (GCW), global wasted work (GWW), global work index (GWI) and global work efficiency (GWE) were analyzed in addition to standard transthoracic echocardiography (TTE) in 60 patients (mean age 61±10 years, 36 male) with left bundle branch block (LBBB), chronic heart failure (HF 2 [2; 3] FC (NYHA), decreased left ventricular ejection fraction (LF EF=28 [23; 31] %) before and 6 months after CRT implantation.. In all patients the segments with maximum and minimum WI value were determined and the difference in segments with maximal and minimal WI (Max-Min WI), as the indicator of myocardial work asymmetry was calculated.
Results. CRT led to reverse cardiac remodeling in 44 (73.3%) patients; clinical stabilization without positive TTE dynamics – in 11 (18.3%) patients, worsening or death – in 5 (8.3%) patients. In both groups of reverse remodeling and clinical stabilization CRT resulted in GWW reduction and thus GWE and GWI enhancement. However, the decrease in GWW in these patients is not accompanied by an increase in GCW and GLS, in contrast to patients with reverse remodeling, who developed statistically significant change in GCW and GLS during CRT. Patients with worsening or death were characterized by a minimal decrease in GWW in CRT (62,0 [9,7; 133,7] vs 149,5 [92.8; 206,2] mmHg% in patients with reverse remodeling and clinical stabilization; p=0,035). Max-Min WI turned out to be directly related to the LV EF change in CRT (rxy=0,336; p=0,017) that makes this value to be one of possible predictors of reverse remodeling during CRT.
Conclusion. Wasted myocardial work can serve a contractile reserve, which represent a target for CRT. Its mobilization and decrease can lead to stable clinical status in patients even in the absence of reverse myocardial remodeling.
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##article.viewOnOriginalSite##About the authors
Elena M. Rimskaya
Chazov National Medical Research Center of Cardiology
Author for correspondence.
Email: eleno4ka_g@mail.ru
ORCID iD: 0000-0002-0063-5474
Russian Federation, Moscow
Svetlana Е. Dobrovolskaya
Chazov National Medical Research Center of Cardiology
Email: eleno4ka_g@mail.ru
ORCID iD: 0000-0003-0580-393X
кандидат медицинских наук, младший научный сотрудник отд. ультразвуковых методов диагностики
Russian Federation, MoscowGennady S. Tarasovskiy
Chazov National Medical Research Center of Cardiology
Email: eleno4ka_g@mail.ru
ORCID iD: 0000-0002-2143-8912
врач-кардиолог отд. клинической электрофизиологии и рентгенохирургических методов лечения нарушений ритма сердца
Russian Federation, MoscowSvetlana Yu. Kashtanova
Chazov National Medical Research Center of Cardiology
Email: eleno4ka_g@mail.ru
ORCID iD: 0000-0003-4731-0818
кандидат медицинских наук, младший научный сотрудник отд. клинической электрофизиологии и рентгенохирургических методов лечения нарушений ритма сердца
Russian Federation, MoscowVictor N. Shitov
Chazov National Medical Research Center of Cardiology
Email: eleno4ka_g@mail.ru
ORCID iD: 0000-0002-8878-7340
младший научный сотрудник отд. ультразвуковых методов диагностики
Russian Federation, MoscowVladimir V. Slobodyanik
Academician Shumakov National Medical Research Center of Transplantology and Artificial Organs
Email: eleno4ka_g@mail.ru
врач сердечно-сосудистый хирург, зав. отд-нием хирургического лечения сложных нарушений ритма сердца и электрокардиостимуляции
Russian Federation, MoscowNataliia A. Mironova
Chazov National Medical Research Center of Cardiology
Email: eleno4ka_g@mail.ru
ORCID iD: 0000-0002-2374-3718
кандидат медицинских наук, старший научный сотрудник отд. клинической электрофизиологии и рентгенохирургических методов лечения нарушений ритма сердца
Russian Federation, MoscowMarina A. Saidova
Chazov National Medical Research Center of Cardiology
Email: eleno4ka_g@mail.ru
ORCID iD: 0000-0002-3233-1862
доктор медицинских наук, профессор, рук. отд. ультразвуковых методов диагностики
Russian Federation, MoscowSergey P. Golitsyn
Chazov National Medical Research Center of Cardiology
Email: eleno4ka_g@mail.ru
ORCID iD: 0000-0001-9913-9974
доктор медицинских наук, профессор, рук. отд. клинической электрофизиологии и рентгенохирургических методов лечения нарушений ритма сердца
Russian Federation, MoscowReferences
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