Potential of non-contrast stress T1 mapping for the assessment of myocardial injury in hypertrophic cardiomyopathy
Abstract Background Ischemia of the hypertrophied myocardium due to microvascular dysfunction is related to a worse prognosis in hypertrophic cardiomyopathy (HCM). Stress and rest T1 mapping without contrast agents can be used to assess myocardial blood flow. Herein, we evaluated the potential of no...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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BMC
2023-09-01
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| Series: | Journal of Cardiovascular Magnetic Resonance |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s12968-023-00966-5 |
| _version_ | 1797669546435280896 |
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| author | Hisanori Kosuge Shoko Hachiya Yasuhiro Fujita Satoshi Hida Taishiro Chikamori |
| author_facet | Hisanori Kosuge Shoko Hachiya Yasuhiro Fujita Satoshi Hida Taishiro Chikamori |
| author_sort | Hisanori Kosuge |
| collection | DOAJ |
| description | Abstract Background Ischemia of the hypertrophied myocardium due to microvascular dysfunction is related to a worse prognosis in hypertrophic cardiomyopathy (HCM). Stress and rest T1 mapping without contrast agents can be used to assess myocardial blood flow. Herein, we evaluated the potential of non-contrast stress T1 mapping in assessing myocardial injury in patients with HCM. Methods Forty-five consecutive subjects (31 HCM patients and 14 control subjects) underwent cardiac magnetic resonance (CMR) at 3T, including cine imaging, T1 mapping at rest and during adenosine triphosphate (ATP) stress, late gadolinium enhancement (LGE), and phase-contrast (PC) cine imaging of coronary sinus flow at rest and during stress to assess coronary flow reserve (CFR). PC cine imaging was performed on 25 subjects (17 patients with HCM and 8 control subjects). Native T1 values at rest and during stress were measured using the 16-segment model, and T1 reactivity was defined as the change in T1 values from rest to stress. Results ATP stress induced a significant increase in native T1 values in both the HCM and control groups (HCM: p < 0.001, control: p = 0.002). T1 reactivity in the HCM group was significantly lower than that in the control group (4.2 ± 0.3% vs. 5.6 ± 0.5%, p = 0.044). On univariate analysis, T1 reactivity correlated with native T1 values at rest, left ventricular mass index, and CFR. Multiple linear regression analysis demonstrated that only CFR was independently correlated with T1 reactivity (β = 0.449; 95% confidence interval, 0.048–0.932; p = 0.032). Furthermore, segmental analysis showed decreased T1 reactivity in the hypertrophied myocardium and the non-hypertrophied myocardium with LGE in the HCM group. Conclusions T1 reactivity was lower in the hypertrophied myocardium and LGE-positive myocardium compared to non-injured myocardium. Non-contrast stress T1 mapping is a promising CMR method for assessing myocardial injury in patients with HCM. Trial registration Retrospectively registered. |
| first_indexed | 2024-03-11T20:45:59Z |
| format | Article |
| id | doaj.art-00a05ac2346c40478e8f39ad63ff623a |
| institution | Directory Open Access Journal |
| issn | 1532-429X |
| language | English |
| last_indexed | 2024-03-11T20:45:59Z |
| publishDate | 2023-09-01 |
| publisher | BMC |
| record_format | Article |
| series | Journal of Cardiovascular Magnetic Resonance |
| spelling | doaj.art-00a05ac2346c40478e8f39ad63ff623a2023-10-01T11:19:50ZengBMCJournal of Cardiovascular Magnetic Resonance1532-429X2023-09-0125111010.1186/s12968-023-00966-5Potential of non-contrast stress T1 mapping for the assessment of myocardial injury in hypertrophic cardiomyopathyHisanori Kosuge0Shoko Hachiya1Yasuhiro Fujita2Satoshi Hida3Taishiro Chikamori4Department of Cardiology, Tokyo Medical UniversityDepartment of Cardiology, Tokyo Medical UniversityDepartment of Cardiology, Tokyo Medical UniversityDepartment of Cardiology, Tokyo Medical UniversityDepartment of Cardiology, Tokyo Medical UniversityAbstract Background Ischemia of the hypertrophied myocardium due to microvascular dysfunction is related to a worse prognosis in hypertrophic cardiomyopathy (HCM). Stress and rest T1 mapping without contrast agents can be used to assess myocardial blood flow. Herein, we evaluated the potential of non-contrast stress T1 mapping in assessing myocardial injury in patients with HCM. Methods Forty-five consecutive subjects (31 HCM patients and 14 control subjects) underwent cardiac magnetic resonance (CMR) at 3T, including cine imaging, T1 mapping at rest and during adenosine triphosphate (ATP) stress, late gadolinium enhancement (LGE), and phase-contrast (PC) cine imaging of coronary sinus flow at rest and during stress to assess coronary flow reserve (CFR). PC cine imaging was performed on 25 subjects (17 patients with HCM and 8 control subjects). Native T1 values at rest and during stress were measured using the 16-segment model, and T1 reactivity was defined as the change in T1 values from rest to stress. Results ATP stress induced a significant increase in native T1 values in both the HCM and control groups (HCM: p < 0.001, control: p = 0.002). T1 reactivity in the HCM group was significantly lower than that in the control group (4.2 ± 0.3% vs. 5.6 ± 0.5%, p = 0.044). On univariate analysis, T1 reactivity correlated with native T1 values at rest, left ventricular mass index, and CFR. Multiple linear regression analysis demonstrated that only CFR was independently correlated with T1 reactivity (β = 0.449; 95% confidence interval, 0.048–0.932; p = 0.032). Furthermore, segmental analysis showed decreased T1 reactivity in the hypertrophied myocardium and the non-hypertrophied myocardium with LGE in the HCM group. Conclusions T1 reactivity was lower in the hypertrophied myocardium and LGE-positive myocardium compared to non-injured myocardium. Non-contrast stress T1 mapping is a promising CMR method for assessing myocardial injury in patients with HCM. Trial registration Retrospectively registered.https://doi.org/10.1186/s12968-023-00966-5Hypertrophic cardiomyopathyT1 mappingMyocardial injuryCoronary flow reserve |
| spellingShingle | Hisanori Kosuge Shoko Hachiya Yasuhiro Fujita Satoshi Hida Taishiro Chikamori Potential of non-contrast stress T1 mapping for the assessment of myocardial injury in hypertrophic cardiomyopathy Journal of Cardiovascular Magnetic Resonance Hypertrophic cardiomyopathy T1 mapping Myocardial injury Coronary flow reserve |
| title | Potential of non-contrast stress T1 mapping for the assessment of myocardial injury in hypertrophic cardiomyopathy |
| title_full | Potential of non-contrast stress T1 mapping for the assessment of myocardial injury in hypertrophic cardiomyopathy |
| title_fullStr | Potential of non-contrast stress T1 mapping for the assessment of myocardial injury in hypertrophic cardiomyopathy |
| title_full_unstemmed | Potential of non-contrast stress T1 mapping for the assessment of myocardial injury in hypertrophic cardiomyopathy |
| title_short | Potential of non-contrast stress T1 mapping for the assessment of myocardial injury in hypertrophic cardiomyopathy |
| title_sort | potential of non contrast stress t1 mapping for the assessment of myocardial injury in hypertrophic cardiomyopathy |
| topic | Hypertrophic cardiomyopathy T1 mapping Myocardial injury Coronary flow reserve |
| url | https://doi.org/10.1186/s12968-023-00966-5 |
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