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Prognostic Value of Late Gadolinium Enhancement Detected on Cardiac Magnetic Resonance in Cardiac Sarcoidosis
Alexander Stevenson1, Jonathan J H Bray2, Laura Tregidgo1
1Department of Cardiology, Royal Free Hospital, London, United Kingdom.
Insights
Late gadolinium enhancement (LGE) on cardiac magnetic resonance (CMR) in sarcoidosis patients significantly increases the risk of ventricular arrhythmias and mortality. Biventricular LGE may provide further prognostic insight into arrhythmogenic risk.
Area of Science:
- Cardiology
- Cardiovascular Imaging
- Immunology
Background:
- Cardiac sarcoidosis affects approximately 5% of sarcoidosis patients, increasing risks of ventricular arrhythmias and sudden cardiac death.
- Late gadolinium enhancement (LGE) on cardiac magnetic resonance (CMR) is a known predictor of adverse outcomes in cardiac sarcoidosis.
- This study systematically reviews LGE's prognostic value in patients with known or suspected cardiac sarcoidosis.
Approach:
- A systematic review and meta-analysis of studies from Embase and MEDLINE (inception to March 2022) was conducted.
- Included studies focused on patients with cardiac sarcoidosis undergoing CMR with LGE.
- Outcomes assessed included all-cause mortality, ventricular arrhythmias, and a composite of both, analyzed with and without consideration of biventricular LGE.
Key Points:
- Thirteen studies with 1,318 participants revealed that LGE on CMR is associated with significantly higher odds of ventricular arrhythmias (OR: 20.3) and all-cause mortality (OR: 3.45).
- Biventricular LGE, invariably present with right ventricular LGE, showed a markedly increased risk of ventricular arrhythmias (OR: 43.6).
- The presence and extent of LGE on CMR are critical prognostic indicators in cardiac sarcoidosis.
Conclusions:
- LGE on CMR is a significant predictor of increased ventricular arrhythmias and mortality in patients with cardiac sarcoidosis.
- Biventricular LGE offers additional prognostic information, particularly regarding arrhythmogenic risk.
- CMR with LGE is valuable for risk stratification and prognosis in cardiac sarcoidosis.
Background:
Sarcoidosis is a complex multisystem inflammatory disorder, with approximately 5% of patients having overt cardiac involvement. Patients with cardiac sarcoidosis are at an increased risk of both ventricular arrhythmias and sudden cardiac death. Previous studies have shown that the presence of late gadolinium enhancement (LGE) on cardiac magnetic resonance (CMR) is associated with an increased risk of mortality and ventricular arrhythmias and may be useful in predicting prognosis.
Objectives:
This systematic review and meta-analysis assessed the value of LGE on CMR imaging in predicting prognosis for patients with known or suspected cardiac sarcoidosis.
Methods:
The authors searched the Embase and MEDLINE databases from inception to March 2022 for studies reporting individuals with known or suspected cardiac sarcoidosis referred for CMR with LGE. Outcomes were defined as all-cause mortality, ventricular arrhythmia, or a composite outcome of either death or ventricular arrhythmias. The primary analysis evaluated these outcomes according to the presence of LGE. A secondary analysis evaluated outcomes specifically according to the presence of biventricular LGE.
Results:
Thirteen studies were included (1,318 participants) in the analysis, with an average participant age of 52.0 years and LGE prevalence of 13% to 70% over a follow-up of 3.1 years. Patients with LGE on CMR vs those without had higher odds of ventricular arrhythmias (odds ratio [OR]: 20.3; 95% CI: 8.1-51.0), all-cause mortality (OR: 3.45; 95% CI: 1.6-7.3), and the composite of both (OR: 9.2; 95% CI: 5.1-16.7). Right ventricular LGE is invariably accompanied by left ventricular LGE. Biventricular LGE is also associated with markedly increased odds of ventricular arrhythmias (OR: 43.6; 95% CI: 16.2-117.2).
Conclusions:
Patients with known or suspected cardiac sarcoidosis with LGE on CMR have significantly increased odds of both ventricular arrhythmias and all-cause mortality. The presence of biventricular LGE may confer additional prognostic information regarding arrhythmogenic risk.
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