ArticleJACC. Advances2025
Prognostic Implications of Cardiac Magnetic Resonance Imaging Characteristics in Primary Mitral Regurgitation.
Article in JACC. Advances, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper, 1 of them a synthesis that pooled it.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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12 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundKnowledge remains limited regarding the relationship between cardiac magnetic resonance (CMR) preoperative characteristics and postoperative clinical outcomes in primary mitral regurgitation (MR).
objectivesThe authors assessed the prognostic value of CMR preoperative characteristics in patients with primary MR due to prolapse or flail undergoing mitral valve surgery.
methodsWe retrospectively studied 284 patients (median age 61 years, 24% women) with chronic significant primary MR, who underwent CMR and echocardiography (echo) prior to mitral valve repair surgery. The endpoint was a composite of all-cause mortality, hospitalization for heart failure, stroke, or life-threatening ventricular arrhythmia.
resultsOver a median follow-up of 7.3 years (Q1-Q3: 3.4-10.5), adverse events occurred in 36 (13%) patients. CMR-left atrial emptying fraction (LAEF) (HR: 1.84 [95% CI: 1.32-2.56]; P < 0.001), CMR-right ventricular ejection fraction (HR: 1.36 [95% CI: 1.00-1.84]; P = 0.047), and CMR-indexed aortic forward stroke volume (HR: 1.40 [95% CI: 0.99-2]; P = 0.059) were each associated with a higher risk of adverse outcomes (HR for decrease in 1 SD). After adjusting for clinical and imaging risk factors, reduced CMR-LAEF remained independently associated with adverse prognosis (adjusted HR: 1.78 [95% CI: 1.27-2.48]; P < 0.001). Patients with CMR-LAEF <30% had higher 5-year event rates (28% vs 4%; P < 0.001) and were at a substantially higher risk of adverse outcomes (adjusted HR: 3.78 [95% CI: 1.83-7.80]; P < 0.001), with added prognostic value confirmed by multiple performance model metrics.
conclusionsIn patients with primary MR, among CMR and echo preoperative characteristics, reduced CMR-LAEF, with a threshold value of 30%, is markedly associated with an increased risk of postoperative adverse outcomes.
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