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Janwetchasil P, Yindeengam A, Krittayaphong R. Prognostic value of global longitudinal strain in patients with preserved left ventricular systolic function: A cardiac magnetic resonance real-world study. J Cardiovasc Magn Reson 2024; 26:101057. [PMID: 38971500 PMCID: PMC11283226 DOI: 10.1016/j.jocmr.2024.101057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Revised: 05/29/2024] [Accepted: 06/29/2024] [Indexed: 07/08/2024] Open
Abstract
BACKGROUND Myocardial strain is a more sensitive parameter for cardiac function evaluation than left ventricular ejection fraction (LVEF). This study aimed to assess the predictive value of left ventricular global longitudinal strain (LV-GLS) by feature tracking-cardiac magnetic resonance (FT-CMR) imaging in patients with known or suspected coronary artery disease (CAD) with preserved left ventricular systolic function. METHODS This retrospective cohort analysis enrolled patients with known or suspected CAD who underwent cardiac magnetic resonance imaging from September 2017 to December 2019. LV-GLS was analyzed via feature-tracking analysis. Patients with LVEF <50% were excluded. The composite outcome comprised all-cause death, non-fatal myocardial infarction, and heart failure. RESULTS There was a total of 2613 patients. Mean follow-up duration was 39.7 ± 13.9 months. During follow-up, 194 patients (7.4%) experienced a composite outcome. The best cutoff of LV-GLS in the prediction of composite outcome from receiver operating characteristics was -14.4%. Patients were classified into 2 groups according to the LV-GLS; 1489 (57.0%) had LV-GLS <-14.4% and 1124 (43.0%) had LV-GLS ≥-14.4%. Patients with LV-GLS ≥-14.4% had a significantly higher rate of composite outcome than LV-GLS <-14.4% patients (3.59 vs. 1.39 per 100 person-years, respectively; p < 0.001). Multivariable analysis showed that patients with LV-GLS ≥-14.4% had a significantly higher risk of experiencing a composite outcome event compared to global longitudinal strain <-14.4% patients (adjusted hazard ratio: 1.83, 95% confidence interval: 1.28-2.61; p = 0.001). CONCLUSION LV-GLS by FT-CMR was shown to be useful for predicting the prognosis of patients with known or suspected CAD with preserved left ventricular systolic function. LV-GLS -14.4% was the identified cutoff for prognostic determination.
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Affiliation(s)
- Preeyaporn Janwetchasil
- Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Ahthit Yindeengam
- Division of Cardiology, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Rungroj Krittayaphong
- Division of Cardiology, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
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Bernhard B, Joss P, Greisser N, Stark AW, Schütze J, Shiri I, Safarkhanlo Y, Fischer K, Guensch DP, Bastiaansen JAM, Pavlicek M, Benz DC, Kwong RY, Gräni C. Prognostic value of visual and quantitative CMR regional myocardial function in patients with suspected myocarditis. Int J Cardiovasc Imaging 2024; 40:907-920. [PMID: 38427272 PMCID: PMC11052711 DOI: 10.1007/s10554-024-03059-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Accepted: 01/17/2024] [Indexed: 03/02/2024]
Abstract
According to updated Lake-Louise Criteria, impaired regional myocardial function serves as a supportive criterion in diagnosing myocarditis. This study aimed to assess visual regional wall motional abnormalities (RWMA) and novel quantitative regional longitudinal peak strain (RLS) for risk stratification in the clinical setting of myocarditis. In patients undergoing CMR and meeting clinical criteria for suspected myocarditis global longitudinal strain (GLS), late gadolinium enhancement (LGE), RWMA and RLS were assessed in the anterior, septal, inferior, and lateral regions and correlated to the occurrence of major adverse cardiac events (MACE), including heart failure hospitalization, sustained ventricular tachycardia, recurrent myocarditis, and all-cause death. In 690 consecutive patients (age: 48.0 ± 16.0 years; 37.7% female) with suspected myocarditis impaired RLS was correlated with RWMA and LV-GLS but not with the presence of LGE. At median follow up of 3.8 years, MACE occurred in 116 (16.8%) patients. Both, RWMA and RLS in anterior-, septal-, inferior-, and lateral- locations were univariately associated with outcomes (all p < 0.001), but not after adjusting for clinical characteristics and LV-GLS. In the subgroup of patients with normal LV function, RWMA were not predictive of outcomes, whereas septal RLS had incremental and independent prognostic value over clinical characteristics (HRadjusted = 1.132, 95% CI 1.020-1.256; p = 0.020). RWMA and RLS can be used to assess regional impairment of myocardial function in myocarditis but are of limited prognostic value in the overall population. However, in the subgroup of patients with normal LV function, septal RLS represents a distinctive marker of regional LV dysfunction, offering potential for risk-stratification.
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Affiliation(s)
- Benedikt Bernhard
- Cardiovascular Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Philippe Joss
- Department of Cardiology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Noah Greisser
- Department of Cardiology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Anselm W Stark
- Department of Cardiology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Jonathan Schütze
- Department of Cardiology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Isaac Shiri
- Department of Cardiology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Yasaman Safarkhanlo
- Department of Cardiology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Kady Fischer
- Department of Anaesthesiology and Pain Medicine, Inselspital, University Hospital Bern, University of Bern, Bern, Switzerland
| | - Dominik P Guensch
- Department of Anaesthesiology and Pain Medicine, Inselspital, University Hospital Bern, University of Bern, Bern, Switzerland
| | - Jessica A M Bastiaansen
- Department of Diagnostic, Interventional and Pediatric Radiology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
- Translation Imaging Center (TIC), Swiss Institute for Translational and Entrepreneurial Medicine, Bern, Switzerland
| | - Maryam Pavlicek
- Department of Cardiology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Dominik C Benz
- Cardiovascular Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Raymond Y Kwong
- Cardiovascular Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Christoph Gräni
- Department of Cardiology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.
- Department of Cardiology, University Hospital Bern, Freiburgstrasse, CH - 3010, Bern, Switzerland.
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Li Y, Sun D, Zhao H, Qin Z, Ji W, Zhang H, Jiao N, Luan B, Ding M, Zhu F. Incremental value of non-invasive myocardial work for the evaluation and prediction of coronary microvascular dysfunction in angina with no obstructive coronary artery disease. Front Cardiovasc Med 2023; 10:1209122. [PMID: 37645517 PMCID: PMC10461476 DOI: 10.3389/fcvm.2023.1209122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 07/28/2023] [Indexed: 08/31/2023] Open
Abstract
Background Evidence suggests that patients suffering from angina with no obstructive coronary artery disease (ANOCA) experience coronary microvascular dysfunction (CMD). We aimed to understand the diagnosis value of noninvasive myocardial work indices (MWIs) with left ventricular pressure-strain loop (LV PSL) by echocardiography in ANOCA patients with CMD. Methods 97 patients with ANOCA were recruited. All subjects underwent standard echocardiography with traditional ultrasound parameters, two-dimensional speckle-tracking echocardiography with global longitudinal strain (GLS), LV PSL with MWIs include global work index (GWI), global constructive work (GCW), global waste work (GWW) and global work efficiency (GWE). In addition, all enrolled cases underwent high-dose adenosine stress echocardiography (SE) with coronary flow velocity reserve (CFVR). CMD was defined as CFVR <2.0. Results Of the 97 patients with ANOCA, 52 were placed in the CMD group and 45 in the control group. GWI and GCW were decreased significantly in the CMD group compared with the control group (P < 0.001 for both). GWI and GCW were moderately correlated with CFVR (r = 0.430, P < 0.001 and r = 0.538, P < 0.001, respectively). In the multiple logistic regression analyses, GCW was identified as the only independent echocardiography parameter associated with CMD after adjusting for age and baseline APV [OR (95%CI) 1.009 (1.005-1.013); P < 0.001]. Moreover, the best predictor of CMD in patients with ANOCA using receiver operating characteristic (ROC) curve was GWI and GCW, with an area under the curve (AUC) of 0.800 and 0.832, sensitivity of 67.3% and 78.8%, specificity of 80.0% and 75.6%, respectively. Conclusion MWIs with LV PSL is a new method to detect LV systolic function noninvasively in ANOCA patients with CMD.
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Affiliation(s)
- Ying Li
- Department of Cardiac Function, The People’s Hospital of Liaoning Province, Shenyang, China
| | - Dandan Sun
- Department of Cardiac Function, The People’s Hospital of Liaoning Province, Shenyang, China
| | - Hanzhang Zhao
- Department of Cardiac Function, The People’s Hospital of Liaoning Province, Shenyang, China
| | - Zhiyan Qin
- Department of Cardiac Function, The People’s Hospital of Liaoning Province, Shenyang, China
| | - Wei Ji
- Department of Cardiac Function, The People’s Hospital of Liaoning Province, Shenyang, China
- Department of Ultrasound, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Huihui Zhang
- Department of Cardiac Function, The People’s Hospital of Liaoning Province, Shenyang, China
| | - Ni Jiao
- Department of Cardiac Function, The People’s Hospital of Liaoning Province, Shenyang, China
| | - Bo Luan
- Department of Cardiology, The People's Hospital of Liaoning Province, Shenyang, China
| | - Mingyan Ding
- Department of Cardiac Function, The People’s Hospital of Liaoning Province, Shenyang, China
| | - Fang Zhu
- Department of Cardiac Function, The People’s Hospital of Liaoning Province, Shenyang, China
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Virbickiene A, Lapinskas T, Garlichs CD, Mattecka S, Tanacli R, Ries W, Torzewski J, Heigl F, Pfluecke C, Darius H, Ince H, Nordbeck P, Butter C, Schuster A, Mitzner S, Dobiliene O, Sheriff A, Kelle S. Imaging Predictors of Left Ventricular Functional Recovery after Reperfusion Therapy of ST-Elevation Myocardial Infarction Assessed by Cardiac Magnetic Resonance. J Cardiovasc Dev Dis 2023; 10:294. [PMID: 37504550 PMCID: PMC10380630 DOI: 10.3390/jcdd10070294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 05/31/2023] [Accepted: 06/11/2023] [Indexed: 07/29/2023] Open
Abstract
BACKGROUND Left ventricular global longitudinal strain (LV GLS) is a superior predictor of adverse cardiac events in patients with myocardial infarction and heart failure. We investigated the ability of morphological features of infarcted myocardium to detect acute left ventricular (LV) dysfunction and predict LV functional recovery after three months in patients with acute ST-segment elevation myocardial infarction (STEMI). METHODS Sixty-six STEMI patients were included in the C-reactive protein (CRP) apheresis in Acute Myocardial Infarction Study (CAMI-1). LV ejection fraction (LVEF), LV GLS, LV global circumferential strain (LV GCS), infarct size (IS), area-at-risk (AAR), and myocardial salvage index (MSI) were assessed by CMR 5 ± 3 days (baseline) and 12 ± 2 weeks after (follow-up) the diagnosis of first acute STEMI. RESULTS Significant changes in myocardial injury parameters were identified after 12 weeks of STEMI diagnosis. IS decreased from 23.59 ± 11.69% at baseline to 18.29 ± 8.32% at follow-up (p < 0.001). AAR and MVO also significantly reduced after 12 weeks. At baseline, there were reasonably moderate correlations between IS and LVEF (r = -0.479, p < 0.001), LV GLS (r = 0.441, p < 0.001) and LV GCS (r = 0.396, p = 0.001) as well as between AAR and LVEF (r = -0.430, p = 0.003), LV GLS (r = 0.501, p < 0.001) and weak with LV GCS (r = 0.342, p = 0.020). At follow-up, only MSI and change in LV GCS over time showed a weak but significant correlation (r = -0.347, p = 0.021). Patients with larger AAR at baseline improved more in LVEF (p = 0.019) and LV GLS (p = 0.020) but not in LV GCS. CONCLUSION The CMR tissue characteristics of myocardial injury correlate with the magnitude of LV dysfunction during the acute stage of STEMI. AAR predicts improvement in LVEF and LV GLS, while MSI is a sensitive marker of LV GCS recovery at three months follow-up after STEMI.
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Affiliation(s)
- Agneta Virbickiene
- Department of Internal Medicine/Cardiology, German Heart Center Berlin, 13353 Berlin, Germany
- Department of Cardiology, Medical Academy, Lithuanian University of Health Sciences, 44307 Kaunas, Lithuania
| | - Tomas Lapinskas
- Department of Internal Medicine/Cardiology, German Heart Center Berlin, 13353 Berlin, Germany
- Department of Cardiology, Medical Academy, Lithuanian University of Health Sciences, 44307 Kaunas, Lithuania
| | | | | | - Radu Tanacli
- Department of Internal Medicine/Cardiology, German Heart Center Berlin, 13353 Berlin, Germany
- Department of Cardiology, Charité University Medicine Berlin, 10117 Berlin, Germany
| | - Wolfgang Ries
- Medical Clinic, DIAKO Flensburg, 24939 Flensburg, Germany
| | - Jan Torzewski
- Cardiovascular Center Oberallgäu-Kempten, 87439 Kempten, Germany
| | - Franz Heigl
- Medical Care Center Kempten-Allgäu, 87437 Kempten, Germany
| | - Christian Pfluecke
- Christian Pfluecke, Department of Internal Medicine I, Städtisches Klinikum Görlitz, Girbigsdorfer Straße 1-3, 02828 Görlitz, Germany
| | - Harald Darius
- Clinic for Cardiology, Angiology, Nephrology, Intensive Care Medicine, Vivantes Clinic Neukölln, 12351 Berlin, Germany
| | - Hueseyin Ince
- Divisions of Cardiology and Nephrology, Department of Internal Medicine, University Medicine Rostock, 18057 Rostock, Germany
| | - Peter Nordbeck
- Department of Internal Medicine I, University Hospital Wuerzburg, 97080 Wuerzburg, Germany
| | - Christian Butter
- Department of Cardiology, University Hospital Heart Centre Brandenburg in Bernau, Brandenburg Medical School (MHB) Theodor Fontane, 16321 Berlin, Germany
| | - Andreas Schuster
- University Medical Center Göttingen, Department of Cardiology and Pneumology, Georg-August University, 37075 Göttingen, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Göttingen, 10785 Göttingen, Germany
| | - Steffen Mitzner
- Divisions of Cardiology and Nephrology, Department of Internal Medicine, University Medicine Rostock, 18057 Rostock, Germany
| | - Olivija Dobiliene
- Department of Cardiology, Medical Academy, Lithuanian University of Health Sciences, 44307 Kaunas, Lithuania
| | - Ahmed Sheriff
- Pentracor GmbH, 16761 Hennigsdorf, Germany
- Gastroenterology/Infectiology/Rheumatology, Charité University Medicine Berlin, 10117 Berlin, Germany
| | - Sebastian Kelle
- Department of Internal Medicine/Cardiology, German Heart Center Berlin, 13353 Berlin, Germany
- German Centre for Cardiovascular Research (DZHK), Partner Site Berlin, 10785 Berlin, Germany
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Dąbrowski EJ, Święczkowski M, Dudzik JM, Grunwald O, Januszko T, Muszyński P, Pogorzelski P, Tokarewicz J, Południewski M, Kożuch M, Dobrzycki S. Percutaneous Coronary Intervention for Chronic Total Occlusion-Contemporary Approach and Future Directions. J Clin Med 2023; 12:jcm12113762. [PMID: 37297958 DOI: 10.3390/jcm12113762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 05/22/2023] [Accepted: 05/24/2023] [Indexed: 06/12/2023] Open
Abstract
In the aging society, the issue of coronary chronic total occlusion (CTO) has become a challenge for invasive cardiologists. Despite the lack of clear indications in European and American guidelines, the rates of percutaneous coronary interventions (PCI) for CTO increased over the last years. Well-conducted randomized clinical trials (RCT) and large observational studies brought significant and substantial progress in many CTO blind spots. However, the results regarding the rationale behind revascularization and the long-term benefit of CTO are inconclusive. Knowing the uncertainties regarding PCI CTO, our work sought to sum up and provide a comprehensive review of the latest evidence on percutaneous recanalization of coronary artery chronic total occlusion.
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Affiliation(s)
- Emil Julian Dąbrowski
- Department of Invasive Cardiology, Medical University of Bialystok, 24A Sklodowskiej-Curie St., 15-276 Bialystok, Poland
| | - Michał Święczkowski
- Department of Invasive Cardiology, Medical University of Bialystok, 24A Sklodowskiej-Curie St., 15-276 Bialystok, Poland
| | - Joanna Maria Dudzik
- Second Department of Nephrology and Hypertension with Dialysis Unit, Medical University of Bialystok, 24A Sklodowskiej-Curie St., 15-276 Bialystok, Poland
| | - Oliwia Grunwald
- Department of Invasive Cardiology, Medical University of Bialystok, 24A Sklodowskiej-Curie St., 15-276 Bialystok, Poland
| | - Tomasz Januszko
- Department of Invasive Cardiology, Medical University of Bialystok, 24A Sklodowskiej-Curie St., 15-276 Bialystok, Poland
| | - Paweł Muszyński
- Department of Invasive Cardiology, Medical University of Bialystok, 24A Sklodowskiej-Curie St., 15-276 Bialystok, Poland
| | - Piotr Pogorzelski
- Department of Invasive Cardiology, Medical University of Bialystok, 24A Sklodowskiej-Curie St., 15-276 Bialystok, Poland
| | - Justyna Tokarewicz
- Department of Invasive Cardiology, Medical University of Bialystok, 24A Sklodowskiej-Curie St., 15-276 Bialystok, Poland
| | - Maciej Południewski
- Department of Invasive Cardiology, Medical University of Bialystok, 24A Sklodowskiej-Curie St., 15-276 Bialystok, Poland
| | - Marcin Kożuch
- Department of Invasive Cardiology, Medical University of Bialystok, 24A Sklodowskiej-Curie St., 15-276 Bialystok, Poland
| | - Sławomir Dobrzycki
- Department of Invasive Cardiology, Medical University of Bialystok, 24A Sklodowskiej-Curie St., 15-276 Bialystok, Poland
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Kim HM, Hwang I, Yoon YE, Park J, Lee S, Kim H, Kim Y, Lim Y, Cho G. Prediction of Deterioration of Left Ventricular Function Using 3-Dimensional Speckle-Tracking Echocardiography in Patients With Left Bundle-Branch Block. J Am Heart Assoc 2022; 12:e026194. [PMID: 36583438 PMCID: PMC9973573 DOI: 10.1161/jaha.122.026194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Background Previous studies have demonstrated that 2-dimensional (2D) global longitudinal strain (GLS) is associated with cardiovascular outcomes in patients with left bundle-branch block. However, the predictive value of 3-dimensional (3D) speckle-tracking echocardiography has not yet been investigated in these patients. Methods and Results The authors retrospectively identified 290 patients with left bundle-branch block who underwent echocardiography more than twice. Using speckle-tracking echocardiography, 2D-GLS, 3D-GLS, 3D-global circumferential strain, 3D global radial strain, and 3D global area strain were acquired. The association between 2D and 3D strains and the follow-up left ventricular (LV) ejection fraction (LVEF) was analyzed. The study population was divided into 2 sets: a group with preserved LVEF (baseline LVEF ≥40%) and a group with reduced LVEF (baseline LVEF <40%). After a median follow-up of 29.1 months (interquartile range, 13.1-53.0 months), 14.9% of patients progressed to LV dysfunction in the group with preserved LVEF, and 51.0% of patients showed improved LV function in the group with reduced LVEF. Multivariable analysis of 2D and 3D strains revealed that higher 2D-GLS (odds ratio [OR], 0.65 [95% CI, 0.54-0.78], P<0.001) was highly associated with maintaining LVEF in patients with preserved LVEF. However, a lower 3D-global circumferential strain (OR, 0.61 [95% CI, 0.47-0.78], P<0.001) showed a strong association with persistently reduced LVEF in patients with reduced LVEF. Conclusions Although 2D-GLS showed a powerful predictive value for the deterioration of LV function in the preserved LVEF group, 3D strain, especially 3D-global circumferential strain, can be helpful to predict consistent LV dysfunction in patients with left bundle-branch block who have reduced LVEF.
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Affiliation(s)
- Hyue Mee Kim
- Division of CardiologyDepartment of Internal MedicineChung‐Ang University HospitalChung‐Ang University College of MedicineSeoulSouth Korea
| | - In‐Chang Hwang
- Cardiovascular Center & Department of Internal MedicineCollege of MedicineSeoul National UniversitySeoul National University Bundang HospitalSeongnamGyeonggiSouth Korea
| | - Yeonyee Elizabeth Yoon
- Cardiovascular Center & Department of Internal MedicineCollege of MedicineSeoul National UniversitySeoul National University Bundang HospitalSeongnamGyeonggiSouth Korea
| | - Jun‐Bean Park
- Cardiovascular Center, Department of Internal MedicineCollege of Medicine, Seoul National UniversitySeoul National University HospitalSeoulSouth Korea
| | - Seung‐Pyo Lee
- Cardiovascular Center, Department of Internal MedicineCollege of Medicine, Seoul National UniversitySeoul National University HospitalSeoulSouth Korea
| | - Hyung‐Kwan Kim
- Cardiovascular Center, Department of Internal MedicineCollege of Medicine, Seoul National UniversitySeoul National University HospitalSeoulSouth Korea
| | - Yong‐Jin Kim
- Cardiovascular Center, Department of Internal MedicineCollege of Medicine, Seoul National UniversitySeoul National University HospitalSeoulSouth Korea
| | - Yaeji Lim
- Department of Applied StatisticsChung‐Ang UniversitySeoulSouth Korea
| | - Goo‐Yeong Cho
- Cardiovascular Center & Department of Internal MedicineCollege of MedicineSeoul National UniversitySeoul National University Bundang HospitalSeongnamGyeonggiSouth Korea
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Comparison of left ventricular deformity and twist parameters during Speckle Tracking with Philips iE33 and Affiniti 70 scanners. COR ET VASA 2021. [DOI: 10.33678/cor.2021.104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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8
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Zhang C, Li X, Mou A, Huang R, Song Q, Liu A, Li Z. Assessment of late gadolinium enhancement-negative chronic total occlusion by longitudinal strain analysis using cardiac magnetic resonance imaging. Acta Radiol 2021; 63:1634-1642. [PMID: 34860127 DOI: 10.1177/02841851211055395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Strain analysis has become commonly used in clinical practice in various heart diseases. PURPOSE To explore whether late gadolinium enhancement (LGE)-negative areas with coronary artery chronic total occlusion (CTO) appear normal when analyzed for longitudinal strain using cardiac magnetic resonance (CMR) imaging. MATERIAL AND METHODS A total of 16 patients and 31 healthy controls who underwent 1.5-T MR at our hospital between January 2015 and July 2017 were included in the study. The LGE-CMR of patients with CTO was negative. Left ventricular functional parameters, segmental longitudinal strain/strain rate, and perfusion parameters were measured using CVI42 software. RESULTS For myocardial segments supplied by CTO vessels, systolic longitudinal strain rate (SLSR)was significantly lower than that of healthy controls, and diastolic longitudinal strain rate (DLSR) was significantly higher (1.19 1/s vs. 1.02 1/s; P = 0.018). Moreover, longitudinal strain (LS), SLSR, and DLSR did not differ between good and poor collateral circulation. Perfusion index of CTO territory segments was lower than non-CTO territory segments (0.20 vs. 0.22; P = 0.027). No correlation was found between longitudinal strain parameters and perfusion parameters. CONCLUSION Although LGE-CMR was negative in patients with CTO, the myocardial SLSR of CTO territory segments was significantly lower than that of healthy controls.
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Affiliation(s)
- Chen Zhang
- Department of Radiology, The First Affiliated Hospital of Dalian Medical University, Dalian City, PR China
| | - Xin Li
- Department of Radiology, The First Affiliated Hospital of Dalian Medical University, Dalian City, PR China
| | - Anna Mou
- Department of Radiology, The First Affiliated Hospital of Dalian Medical University, Dalian City, PR China
| | - RongChong Huang
- Department of Cardiology, The First Affiliated Hospital of Dalian Medical University, Dalian City, PR China
| | - Qingwei Song
- Department of Radiology, The First Affiliated Hospital of Dalian Medical University, Dalian City, PR China
| | - Ailian Liu
- Department of Radiology, The First Affiliated Hospital of Dalian Medical University, Dalian City, PR China
| | - Zhiyong Li
- Department of Radiology, The First Affiliated Hospital of Dalian Medical University, Dalian City, PR China
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9
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Valente FX, Gavara J, Gutierrez L, Rios-Navarro C, Rello P, Maymi M, Fernandez-Galera R, Monmeneu JV, Sao-Aviles A, Lopez-Lereu MP, Gonzalez-Alujas MT, Moratal D, Cuellar H, Barrabés J, Otaegui I, Evangelista A, Ferreira I, Bodi V, Rodriguez-Palomares J. Predictive Value of Cardiac Magnetic Resonance Feature Tracking after Acute Myocardial Infarction: A Comparison with Dobutamine Stress Echocardiography. J Clin Med 2021; 10:jcm10225261. [PMID: 34830543 PMCID: PMC8624532 DOI: 10.3390/jcm10225261] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Revised: 11/04/2021] [Accepted: 11/09/2021] [Indexed: 11/16/2022] Open
Abstract
In acute ST-segment elevation myocardial infarction (STEMI) late gadolinium enhancement (LGE) may underestimate segmental functional recovery. We evaluated the predictive value of cardiac magnetic resonance (CMR) feature-tracking (FT) for functional recovery and whether it incremented the value of LGE compared to low-dose dobutamine stress echocardiography (LDDSE) and speckle-tracking echocardiography (STE). Eighty patients underwent LDDSE and CMR within 5–7 days after STEMI and segmental functional recovery was defined as improvement in wall-motion at 6-months CMR. Optimal conventional and FT parameters were analyzed and then also applied to an external validation cohort of 222 STEMI patients. Circumferential strain (CS) was the strongest CMR-FT predictor and addition to LGE increased the overall accuracy to 74% and was especially relevant in segments with 50–74% LGE (AUC 0.60 vs. 0.75, p = 0.001). LDDSE increased the overall accuracy to 71%, and in the 50–74% LGE subgroup improved the AUC from 0.60 to 0.69 (p = 0.039). LGE + CS showed similar value as LGE + LDDSE. In the validation cohort, CS was also the strongest CMR-FT predictor of recovery and addition of CS to LGE improved overall accuracy to 73% although this difference was not significant (AUC 0.69, p = 0.44). Conclusion: CS is the strongest CMR-FT predictor of segmental functional recovery after STEMI. Its incremental value to LGE is comparable to that of LDDSE whilst avoiding an inotropic stress agent. CS is especially relevant in segments with 50–74% LGE where accuracy is lower and further testing is frequently required to clarify the potential for recovery.
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Affiliation(s)
- Filipa X. Valente
- Cardiology Department, Hospital Universitari Vall d’Hebron, 08035 Barcelona, Spain; (L.G.); (P.R.); (M.M.); (R.F.-G.); (A.S.-A.); (M.T.G.-A.); (J.B.); (I.O.); (A.E.); (I.F.); (J.R.-P.)
- Correspondence:
| | - José Gavara
- Centro de Biomateriales y Ingeniería de Tejidos, Universitat Politècnica de Valencia, 46022 Valencia, Spain; (J.G.); (D.M.)
| | - Laura Gutierrez
- Cardiology Department, Hospital Universitari Vall d’Hebron, 08035 Barcelona, Spain; (L.G.); (P.R.); (M.M.); (R.F.-G.); (A.S.-A.); (M.T.G.-A.); (J.B.); (I.O.); (A.E.); (I.F.); (J.R.-P.)
| | - Cesar Rios-Navarro
- Instituto de Investigación Sanitaria INCLIVA, 46010 Valencia, Spain; (C.R.-N.); (V.B.)
| | - Pau Rello
- Cardiology Department, Hospital Universitari Vall d’Hebron, 08035 Barcelona, Spain; (L.G.); (P.R.); (M.M.); (R.F.-G.); (A.S.-A.); (M.T.G.-A.); (J.B.); (I.O.); (A.E.); (I.F.); (J.R.-P.)
| | - Manel Maymi
- Cardiology Department, Hospital Universitari Vall d’Hebron, 08035 Barcelona, Spain; (L.G.); (P.R.); (M.M.); (R.F.-G.); (A.S.-A.); (M.T.G.-A.); (J.B.); (I.O.); (A.E.); (I.F.); (J.R.-P.)
| | - Ruben Fernandez-Galera
- Cardiology Department, Hospital Universitari Vall d’Hebron, 08035 Barcelona, Spain; (L.G.); (P.R.); (M.M.); (R.F.-G.); (A.S.-A.); (M.T.G.-A.); (J.B.); (I.O.); (A.E.); (I.F.); (J.R.-P.)
| | - José V. Monmeneu
- Unidad de Resonancia Magnética Cardiovascular, Exploraciones Radiológicas Especiales (ERESA), 46015 Valencia, Spain; (J.V.M.); (M.P.L.-L.)
| | - Augusto Sao-Aviles
- Cardiology Department, Hospital Universitari Vall d’Hebron, 08035 Barcelona, Spain; (L.G.); (P.R.); (M.M.); (R.F.-G.); (A.S.-A.); (M.T.G.-A.); (J.B.); (I.O.); (A.E.); (I.F.); (J.R.-P.)
| | - Maria P. Lopez-Lereu
- Unidad de Resonancia Magnética Cardiovascular, Exploraciones Radiológicas Especiales (ERESA), 46015 Valencia, Spain; (J.V.M.); (M.P.L.-L.)
| | - M. Teresa Gonzalez-Alujas
- Cardiology Department, Hospital Universitari Vall d’Hebron, 08035 Barcelona, Spain; (L.G.); (P.R.); (M.M.); (R.F.-G.); (A.S.-A.); (M.T.G.-A.); (J.B.); (I.O.); (A.E.); (I.F.); (J.R.-P.)
| | - David Moratal
- Centro de Biomateriales y Ingeniería de Tejidos, Universitat Politècnica de Valencia, 46022 Valencia, Spain; (J.G.); (D.M.)
| | - Hug Cuellar
- Radiology Department, Hospital Universitari Vall d’Hebron, 08035 Barcelona, Spain;
| | - José Barrabés
- Cardiology Department, Hospital Universitari Vall d’Hebron, 08035 Barcelona, Spain; (L.G.); (P.R.); (M.M.); (R.F.-G.); (A.S.-A.); (M.T.G.-A.); (J.B.); (I.O.); (A.E.); (I.F.); (J.R.-P.)
| | - Imanol Otaegui
- Cardiology Department, Hospital Universitari Vall d’Hebron, 08035 Barcelona, Spain; (L.G.); (P.R.); (M.M.); (R.F.-G.); (A.S.-A.); (M.T.G.-A.); (J.B.); (I.O.); (A.E.); (I.F.); (J.R.-P.)
| | - Artur Evangelista
- Cardiology Department, Hospital Universitari Vall d’Hebron, 08035 Barcelona, Spain; (L.G.); (P.R.); (M.M.); (R.F.-G.); (A.S.-A.); (M.T.G.-A.); (J.B.); (I.O.); (A.E.); (I.F.); (J.R.-P.)
| | - Ignacio Ferreira
- Cardiology Department, Hospital Universitari Vall d’Hebron, 08035 Barcelona, Spain; (L.G.); (P.R.); (M.M.); (R.F.-G.); (A.S.-A.); (M.T.G.-A.); (J.B.); (I.O.); (A.E.); (I.F.); (J.R.-P.)
| | - Vicente Bodi
- Instituto de Investigación Sanitaria INCLIVA, 46010 Valencia, Spain; (C.R.-N.); (V.B.)
- Cardiology Department, Hospital Clínico Universitario de Valencia, 46010 Valencia, Spain
- Centrode Investigación Biomédica en Red—Cardiovascular (CIBER-CV), 28029 Madrid, Spain
- Medicine Department, Facultad de Medicina y Odontología, Universidad de Valencia, 46010 Valencia, Spain
| | - José Rodriguez-Palomares
- Cardiology Department, Hospital Universitari Vall d’Hebron, 08035 Barcelona, Spain; (L.G.); (P.R.); (M.M.); (R.F.-G.); (A.S.-A.); (M.T.G.-A.); (J.B.); (I.O.); (A.E.); (I.F.); (J.R.-P.)
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10
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Recovery of right ventricular function and strain in patients with ST-segment elevation myocardial infarction and concurrent chronic total occlusion. Int J Cardiovasc Imaging 2021; 38:631-641. [PMID: 34554368 PMCID: PMC8926979 DOI: 10.1007/s10554-021-02423-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 09/16/2021] [Indexed: 12/04/2022]
Abstract
The right ventricle (RV) is frequently involved in ST-segment elevation myocardial infarction (STEMI) when the culprit or concurrent chronic total occlusion (CTO) is located in the right coronary artery (RCA). We investigated RV function recovery in STEMI-patients with concurrent CTO. In EXPLORE, STEMI-patients with concurrent CTO were randomized to CTO percutaneous coronary intervention (PCI) or no CTO-PCI. We analyzed 174 EXPLORE patients with serial cardiovascular magnetic resonance imaging RV data (baseline and 4-month follow-up), divided into three groups: CTO-RCA (CTO in RCA, culprit in non-RCA; n = 89), IRA-RCA (infarct related artery [IRA] in RCA, CTO in non-RCA; n = 56), and no-RCA (culprit and CTO not in RCA; n = 29). Tricuspid annular plane systolic excursion (TAPSE), RV ejection fraction (RVEF), RV global longitudinal strain (GLS) and free wall longitudinal strain (FWLS) were measured. We found that RV strain and TAPSE improved in IRA-RCA and CTO-RCA (irrespective of CTO-PCI) at follow-up, but not in no-RCA. Only RV FWLS was different among groups at baseline, which was lower in IRA-RCA than no-RCA (− 26.0 ± 8.3% versus − 31.0 ± 6.4%, p = 0.006). Baseline RVEF, RV end-diastolic volume and TAPSE were associated with RVEF at 4 months. RV function parameters were not predictive of 4 year mortality, although RV GLS showed additional predictive value for New York Heart Association Classification > 1 at 4 months. In conclusion, RV parameters significantly improved in patients with acute or chronic RCA occlusion, but not in no-RCA patients. RV FWLS was the only RV parameter able to discriminate between acute ischemic and non-ischemic myocardium. Moreover, RV GLS was independently predictive for functional status.
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11
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Yu S, Zhou J, Yang K, Chen X, Zheng Y, Zhao K, Song J, Ji K, Zhou P, Yan H, Zhao S. Correlation of Myocardial Strain and Late Gadolinium Enhancement by Cardiac Magnetic Resonance After a First Anterior ST-Segment Elevation Myocardial Infarction. Front Cardiovasc Med 2021; 8:705487. [PMID: 34277744 PMCID: PMC8282997 DOI: 10.3389/fcvm.2021.705487] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 06/01/2021] [Indexed: 11/24/2022] Open
Abstract
Objectives: To investigate the correlation of cardiac magnetic resonance (CMR) feature-tracking with conventional CMR parameters in patients with a first anterior ST-segment elevation myocardial infarction (STEMI). Methods: This sub-analysis of OCTAMI (Optical Coherence Tomography Examination in Acute Myocardial Infarction) registry included 129 patients who finished a CMR examination 1 month after a first anterior STEMI. Cine images were applied to calculate both global and segmental left ventricular peak strain parameters. The patients were divided into two groups by left ventricular ejection fraction (LVEF) and compared with 42 healthy controls. Segmental late gadolinium enhancement (LGE) was graded according to LGE transmurality as follows: (1) >0 to ≤ 25%; (2) >25 to ≤ 50%; (3) >50 to ≤ 75%; (4) >75%. Left ventricle was divided into infarcted, adjacent, and remote regions to assess regional function. Results: Compared with controls, global radial (28.39 ± 5.08% vs. 38.54 ± 9.27%, p < 0.05), circumferential (−16.91 ± 2.11% vs. −20.77 ± 2.78%, p < 0.05), and longitudinal (−13.06 ± 2.15 vs. −15.52 ± 2.69, p < 0.05) strains were impaired in STEMI patients with normal LVEF (≥55%). Strain parameters were strongly associated with LGE (radial: r = 0.65; circumferential: r = 0.69; longitudinal: r = 0.61; all p < 0.05). A significant and stepwise impairment of global strains was observed in groups divided by LGE tertiles. Furthermore, segmental strain was different in various degrees of LGE transmurality especially for radial and circumferential strain. Strains of adjacent region were better than infarcted region in radial and circumferential directions and worse than remote region in all three directions. Conclusion: Global and regional strain could stratify different extent and transmurality of LGE, respectively. Although without LGE, adjacent region had impaired strains comparing with remote region.
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Affiliation(s)
- Shiqin Yu
- State Key Laboratory of Cardiovascular Disease, MR Center, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Jinying Zhou
- Stata Key Laboratory of Cardiovascular Disease, Coronary Heart Disease Center, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Kai Yang
- State Key Laboratory of Cardiovascular Disease, MR Center, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Xiuyu Chen
- State Key Laboratory of Cardiovascular Disease, MR Center, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Yucong Zheng
- State Key Laboratory of Cardiovascular Disease, MR Center, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Kankan Zhao
- Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, SZ University Town, Shenzhen, China
| | - Jialin Song
- State Key Laboratory of Cardiovascular Disease, MR Center, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Keshan Ji
- State Key Laboratory of Cardiovascular Disease, MR Center, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Peng Zhou
- Stata Key Laboratory of Cardiovascular Disease, Coronary Heart Disease Center, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Hongbing Yan
- Stata Key Laboratory of Cardiovascular Disease, Coronary Heart Disease Center, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.,Fuwai Hospital, Chinese Academy of Medical Sciences, Shenzhen, China
| | - Shihua Zhao
- State Key Laboratory of Cardiovascular Disease, MR Center, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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12
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Emrich T, Halfmann M, Schoepf UJ, Kreitner KF. CMR for myocardial characterization in ischemic heart disease: state-of-the-art and future developments. Eur Radiol Exp 2021; 5:14. [PMID: 33763757 PMCID: PMC7990980 DOI: 10.1186/s41747-021-00208-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 01/22/2021] [Indexed: 01/25/2023] Open
Abstract
Ischemic heart disease and its sequelae are one of the major contributors to morbidity and mortality worldwide. Over the last decades, technological developments have strengthened the role of noninvasive imaging for detection, risk stratification, and management of patients with ischemic heart disease. Cardiac magnetic resonance (CMR) imaging incorporates both functional and morphological characterization of the heart to determine presence, acuteness, and severity of ischemic heart disease by evaluating myocardial wall motion and function, the presence and extent of myocardial edema, ischemia, and scarring. Currently established clinical protocols have already demonstrated their diagnostic and prognostic value. Nevertheless, there are emerging imaging technologies that provide additional information based on advanced quantification of imaging biomarkers and improved diagnostic accuracy, therefore potentially allowing reduction or avoidance of contrast and/or stressor agents. The aim of this review is to summarize the current state of the art of CMR imaging for ischemic heart disease and to provide insights into promising future developments.
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Affiliation(s)
- Tilman Emrich
- Department of Diagnostic and Interventional Radiology, University Medical Center, Mainz; Langenbeckstraße 1, 55131, Mainz, Germany. .,German Center for Cardiovascular Research (DZHK), Partner Site Rhine Main, Mainz, Langenbeckstraße 1, 55131, Mainz, Germany. .,Department of Radiology and Radiological Science, Medical University of South Carolina, 25 Courtenay Drive, Charleston, SC, 29425, USA.
| | - Moritz Halfmann
- Department of Diagnostic and Interventional Radiology, University Medical Center, Mainz; Langenbeckstraße 1, 55131, Mainz, Germany.,German Center for Cardiovascular Research (DZHK), Partner Site Rhine Main, Mainz, Langenbeckstraße 1, 55131, Mainz, Germany
| | - U Joseph Schoepf
- Department of Radiology and Radiological Science, Medical University of South Carolina, 25 Courtenay Drive, Charleston, SC, 29425, USA
| | - Karl-Friedrich Kreitner
- Department of Diagnostic and Interventional Radiology, University Medical Center, Mainz; Langenbeckstraße 1, 55131, Mainz, Germany
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13
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Beitzke D, Gremmel F, Senn D, Laggner R, Kammerlander A, Wielandner A, Nolz R, Hülsmann M, Loewe C. Effects of Levosimendan on cardiac function, size and strain in heart failure patients. Int J Cardiovasc Imaging 2020; 37:1063-1071. [PMID: 33103224 PMCID: PMC7969546 DOI: 10.1007/s10554-020-02077-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 10/16/2020] [Indexed: 01/23/2023]
Abstract
Levosimendan improves cardiac function in heart failure populations; however, its exact mechanism is not well defined. We analysed the short-term impact of levosimendan in heart failure patients with ischemic and non-ischemic cardiomyopathy (CMP) using multiparametric cardiac magnetic resonance (CMR). We identified 33 patients with ischemic or non-ischemic CMP who received two consecutive CMR scans prior to and within one week after levosimendan administration. Changes in LV ejection fraction (LVEF) and LV volumes, as well as changes in strain rates, were measured prior to and within one week after levosimendan infusion. LV scarring, based on late gadolinium enhancement (LGE), was correlated to changes in LV size and strain rates. Both LV endiastolic (EDV) and endsystolic volumes (ESV) significantly decreased (EDV: p=0,001; ESV: p=0,002) after levosimendan administration, with no significant impact on LVEF (p=0.41), cardiac output (p=0.61), and strain rates. Subgroup analyses of ischemic or non-ischemic CMP showed no significant differences between the groups in terms of short-term LV reverse remodeling. The presence and extent of scarring in LGE did not correlate with changes in LV size and strain rates. CMR is able to monitor cardiac effects of levosimendan infusion. Short-term follow-up of a single levosimendan infusion using CMR shows a significant decrease in LV size, but no impact on LVEF or strain measurements. There was no difference between patients with ischemic or non-ischemic CMP. Quantification of LV scarring in CMR is not able to predict changes in LV size and strain rates in response to levosimendan.
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Affiliation(s)
- D Beitzke
- Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria.
| | - F Gremmel
- Department of Surgery, Medical University of Vienna, Vienna, Austria
| | - D Senn
- Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria
| | - R Laggner
- Department of Orthopedics and Trauma Surgery, Medical University of Vienna, Vienna, Austria
| | - A Kammerlander
- Department of Internal Medicine II / Division of Cardiology, Medical University of Vienna, Vienna, Austria
| | - A Wielandner
- Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria
| | - R Nolz
- Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria
| | - M Hülsmann
- Department of Internal Medicine II / Division of Cardiology, Medical University of Vienna, Vienna, Austria
| | - C Loewe
- Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria
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