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Published on: December 22, 2023
[Arrhythmogenic cardiomyopathy. Patterns of ventricular involvement using cardiac magnetic resonance]
Begoña Igual1, Esther Zorio, Alicia Maceira
1Unidad de Imagen Cardiaca, ERESA, Unidad de Muerte Súbita Familiar, Hospital Universitari i Politècnic La Fe, Valencia, España. bigual@eresa.com
Insights
Left ventricle involvement is common in arrhythmogenic cardiomyopathy, with late gadolinium enhancement frequently observed. This study used cardiovascular magnetic resonance to detail ventricular patterns and enhancement in these conditions.
Area of Science:
- Cardiology
- Cardiovascular Imaging
- Medical Diagnostics
Context:
- Arrhythmogenic cardiomyopathy (ACM) spectrum now includes biventricular and left dominant forms.
- Understanding ventricular involvement patterns is crucial for diagnosis and management.
- Cardiovascular magnetic resonance (CMR) is a key imaging modality for ACM.
Purpose:
- To describe ventricular involvement patterns using CMR.
- To characterize late gadolinium enhancement (LGE) in ACM variants.
- To investigate patterns in biventricular and left dominant ACM.
Summary:
- CMR revealed left ventricle (LV) involvement in 92% of ACM patients, predominantly with LGE.
- Right ventricle (RV) involvement occurred in 73%, with varying degrees of dysfunction and LGE.
- LV LGE was most common in inferior, lateral, and inferolateral walls, often subepicardial or transmural.
Impact:
- Highlights the high prevalence of LV involvement in ACM.
- Provides detailed insights into LGE patterns, aiding diagnostic accuracy.
- Informs clinical understanding and potential therapeutic strategies for ACM.
Introduction And Objectives:
Biventricular arrhythmogenic cardiomyopathy and left dominant arrhythmogenic cardiomyopathy forms had recently been included in the spectrum of arrhythmogenic cardiomyopathy. The aim of the study was to describe, using cardiovascular magnetic resonance, the patterns of ventricular involvement as well as late gadolinium enhancement in these conditions.
Methods:
Medical databases and records from the cardiology units of 3 hospitals were reviewed to obtain data from patients with arrhythmogenic cardiomyopathy.
Results:
Twenty-six consecutive patients were included (40 [16] years, 16 males). Right ventricle involvement was present in 19 patients (73%). Among them, 13 patients (50%) had volumes over the upper limit of normality, 11 (42%) patients had late gadolinium enhancement in right ventricle and 6 patients (23%) had just mild involvement with wall motion abnormalities or microaneurysms. Left ventricle involvement was present in 24 patients (92%), all of them with late gadolinium enhancement. In 15 patients (57%) left ventricular systolic dysfunction was observed, and dilatation in 3 patients (11%). Late gadolinium enhancement was more frequent in the inferior, lateral, and inferolateral walls (65%, 57%, and 61% of patients, respectively) while septum was seldom affected (26% of cases). The pattern of late gadolinium enhancement was mainly subepicardial (46% of patients) or transmural (19%), and was intramyocardial in only 12% of the cases.
Conclusions:
In this sample, left ventricle involvement is very common. The most frequent finding was left ventricular late gadolinium enhancement, while the least frequent was dilatation. The pattern of late gadolinium enhancement was more frequently subepicardial and located in the inferior and inferolateral walls.
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