Myocardial Strain Characteristics on Cardiac Magnetic Resonance Feature Tracking in Patients with Chronic Coronary Syndrome
Main Article Content
Abstract
Objective: To describe myocardial strain characteristics on cardiac magnetic resonance feature tracking (CMR-FT) and to assess the relationship between strain and other CMR parameters in patients with chronic coronary syndrome (CCS).
Materials and Methods: A cross-sectional study on 36 CCS patients (2024 ESC criteria) undergoing 1.5 Tesla CMR; global longitudinal (GLS), circumferential (GCS) and radial (GRS) strain were measured by feature tracking (Caas MR Strain).
Results: GLS −11.9 ± 5.0%, GCS −11.5 ± 5.5%, GRS 22.8 ± 11.2%; the proportions of patients with impaired strain (pathological cut-offs) were 72.2%, 63.9%, and 50.0%, respectively. All three strain parameters were significantly lower in patients with reduced LVEF and in those with LGE than in patients with preserved LVEF and without LGE (all p < 0.001). Strain parameters correlated strongly with LVEF (Spearman: GCS, ρ = −0.79; GLS, ρ = −0.73) and moderately with %LGE (ρ up to 0.63). GLS and GCS predicted the presence of LGE, with AUCs of 0.87 and 0.91, respectively
Conclusion: Myocardial strain by CMR-FT is markedly reduced in CCS patients and is closely related to systolic function and myocardial scar, providing additional information on left ventricular contractile function beyond LVEF and LGE, especially when LVEF is preserved.
Keywords
cardiac magnetic resonance, feature tracking, myocardial strain, chronic coronary syndrome.
Article Details
References
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