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Late gadolinium enhancement cardiac magnetic resonance imaging for the prediction of ventricular tachyarrhythmic events: a meta‐analysis
Author(s) -
Scott Paul A.,
Rosengarten James A.,
Curzen Nick P.,
Morgan John M.
Publication year - 2013
Publication title -
european journal of heart failure
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.149
H-Index - 133
eISSN - 1879-0844
pISSN - 1388-9842
DOI - 10.1093/eurjhf/hft053
Subject(s) - medicine , cardiology , risk stratification , implantable cardioverter defibrillator , cardiac magnetic resonance imaging , confidence interval , sudden cardiac death , magnetic resonance imaging , cardiac magnetic resonance , ejection fraction , cardiomyopathy , relative risk , heart failure , radiology
Aims Approaches to the risk stratification for sudden cardiac death (SCD) remain unsatisfactory. Although late gadolinium enhancement cardiac magnetic resonance imaging (LGE‐CMR) for SCD risk stratification has been evaluated in several studies, small sample size has limited their clinical validity. We performed this meta‐analysis to better gauge the predictive accuracy of LGE‐CMR for SCD risk stratification. Methods and results Electronic databases and published bibliographies were systematically searched to identify studies evaluating the association between the extent of LV scar on LGE‐CMR and ventricular arrhythmic events [SCD, resuscitated cardiac arrest, the occurrence of ventricular arrhythmias, or appropriate implantable cardioverter defibrillator (ICD) therapy]. Only studies enrolling patients with CAD or non‐ischaemic cardiomyopathy were included. Summary estimates of the relative risk (RR) and likelihood ratios (LRs) were calculated using random effects models. Eleven studies comprising 1105 patients were identified. During a mean/median follow‐up of 8.5–41 months 207 patients had ventricular arrhythmic events. Ventricular arrhythmic events were more common in patients with a greater extent of LV scar: RR 4.33 [95% confidence interval (CI) 2.98–6.29], positive LR 1.98 (95% CI 1.66–2.37), and negative LR 0.33 (95% CI 0.24–0.46). Conclusion The extent of LGE on CMR is strongly associated with the occurrence of ventricular arrhythmias in patients with reduced LVEF and may be a valuable risk stratification tool for identifying patients who will benefit from ICD therapy. However, uncertainties regarding clinical application persist and need to be addressed prior to introduction into broad clinical practice.