Assessing myocardial function in chronic aortic regurgitation requires precise diagnostic tools. Consequently, evaluating Cardiac MRI Strain has gained significant clinical interest for risk prediction. A recent study evaluated left ventricular global longitudinal strain using cine MRI with feature tracking. Specifically, researchers analyzed 175 patients with moderate to severe chronic aortic regurgitation.

Clinical Value of Cardiac MRI Strain Analysis

During a median follow-up of 3.4 years, composite adverse events occurred in 23% of patients. These events included 11 deaths and 30 heart failure hospitalizations. Furthermore, multivariable analysis showed that strain values of minus 14% or higher predicted worse outcomes. In fact, medically managed patients with impaired strain faced an eightfold higher risk of adverse events.

Surgical Impact and Patient Outcomes

Aortic valve replacement was performed in 37% of the cohort. Interestingly, patients with preserved strain before surgery achieved significantly better post-operative outcomes. Moreover, strain remained independently prognostic across the entire patient cohort after adjusting for key baseline variables. Therefore, routine strain assessment could enhance management strategies for chronic aortic valve disease.

Frequently Asked Questions

Q1: What is the primary prognostic threshold identified for cardiac MRI strain in this study?

In medically managed patients, a strain threshold of minus 14% or higher indicated significantly elevated risk. Additionally, this threshold was strongly associated with all-cause death and heart failure hospitalization.

Q2: How does cardiac MRI strain impact post-surgical outcomes in chronic aortic regurgitation?

Patients with better baseline strain values experienced superior clinical outcomes following aortic valve replacement. Consequently, preoperative strain assessment helps identify candidates who benefit most from timely intervention.

Q3: Why is cardiac MRI strain useful alongside traditional ejection fraction?

Ejection fraction can remain normal despite underlying myocardial damage in chronic regurgitation. However, strain imaging detects subtle contractile dysfunction much earlier in the disease process.

References

Hashimoto G et al. Association between Cardiac MRI-derived Global Longitudinal Strain and Clinical Outcomes in Chronic Aortic Regurgitation. Radiol Cardiothorac Imaging. 2026 Aug undefined. doi: 10.1148/ryct.250239. PMID: 42530456.
Al-Mohaissen MA. Global Longitudinal Strain as a Prognostic Biomarker for Asymptomatic Moderate to Severe Aortic Regurgitation with Preserved Ejection Fraction: A Systematic Review and Meta-Analysis. J Clin Med. 2025 Sep. doi: 10.3390/jcm14186534.