Abstract
Objectives
In patients with repaired coarctation of aorta (CoA), we assessed ventriculo-vascular characteristics using CMR-derived aortic area strain (AAS), left atrial (LA) and left ventricular (LV) longitudinal and circumferential strain (LS, CS).
Methods
Seventy-five subjects including 50 with repaired CoA divided into hypertensive (n = 25), normotensive (n = 25) and 25 controls were studied. AAS was measured at 3 levels: ascending aorta, proximal descending and descending aorta. LA and LV LS were measured using CMR-feature tracking. LA and LV end-diastolic volumes, ejection fraction (EF) and mass were measured.
Results
Mean patient age was 19.7 ± 6.7 and controls 23 ± 15 (years). All strains (LA, LV, ascending and descending aortic) were lower in CoA subgroups compared to controls except the AAS at diaphragm, which was not different. Comparisons between hypertensive and normotensive CoA showed no differences in LV mass, LV volumetric indices, and LA and LV strain indices; however, ascending AAS was lower in hypertensive subgroup (p = 0.02). Ascending AAS was correlated with LV mass (r = −0.4, p = 0.005), LVEF (r = −0.4, p = 0.004), systolic blood pressure (r = −0.5, p = 0.0001) and LVLS (r = 0.5, p = 0.001).
Conclusions
Ascending AAS correlated with LV mass, EF and LVLS. In hypertensive CoA, ascending AAS was reduced compared to normotensive CoA and controls, indicating vascular remodelling differences influenced by ongoing hypertension.
Key Points
• Impaired arterial strain is a measure of increased stiffness in arteries
• Ascending aorta strain correlates with left ventricular mass and longitudinal strain
• Ascending aorta strain is significantly lower in hypertensive coarctation patients
• Hypertension may be a consequence of vascular pathology persisting despite repair
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Abbreviations
- AAS:
-
Aortic area strain
- AAAS:
-
Ascending aortic area strain
- BSA:
-
Body surface area
- CoA:
-
Coarctation of the aorta
- CHD:
-
Congenital heart disease
- CMR-FT:
-
Cardiac magnetic resonance-feature tracking
- DAAS:
-
Descending aortic area strain
- DBP:
-
Diastolic blood pressure
- DDAAS:
-
Distal descending aortic area strain
- EDVi:
-
Indexed end-diastolic volume
- EF:
-
Ejection fraction
- HT:
-
Hypertensive
- LA:
-
Left atrium
- LALS:
-
LA longitudinal strain
- LV:
-
Left ventricle
- LVCS:
-
LV circumferential strain
- LVLS:
-
LV longitudinal strain
- LV mass i:
-
Indexed LV mass
- NT:
-
Normotensive
- SBP:
-
Systolic blood pressure
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Acknowledgments
The authors appreciate the assistance of the Magnetic Resonance Imaging Laboratory staff at the Children’s Hospital and Medical Center. We also thank Berthold Klas, BS, TomTec Imaging Systems, TomTec Corporation USA for technical assistance.
The scientific guarantor of this publication is Shelby Kutty. The authors of this manuscript declare no relationships with any companies whose products or services may be related to the subject matter of the article. Shelby Kutty has received support from the American Heart Association and Children’s Hospital and Medical Center Foundation. David Danford kindly provided statistical advice for this manuscript. Institutional review board approval was obtained. Written consent was waived because this was a retrospective study. Approval from the institutional animal care committee was not required because this is a human study. None of the study subjects or cohorts have been previously reported. Methodology: retrospective, case-control study, multicentre study.
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Shang, Q., Sarikouch, S., Patel, S. et al. Assessment of ventriculo-vascular properties in repaired coarctation using cardiac magnetic resonance-derived aortic, left atrial and left ventricular strain. Eur Radiol 27, 167–177 (2017). https://doi.org/10.1007/s00330-016-4373-8
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DOI: https://doi.org/10.1007/s00330-016-4373-8