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Echocardiographic features of Fabry cardiomyopathy-Comparison with hypertrophy-matched sarcomeric hypertrophic
Sebastian Militaru1,2,3, Ruxandra Jurcuț1,2, Robert Adam1,2
1Department of Cardiology, Expert Center for Rare Genetic Cardiovascular Diseases, Emergency Institute of Cardiovascular Diseases "Prof. Dr. C. C. Iliescu", Bucharest, Romania.
Insights
Echocardiography can differentiate Fabry cardiomyopathy from sarcomeric hypertrophic cardiomyopathy (HCM). Key differences include lower ejection fraction and altered strain patterns in Fabry disease, aiding early diagnosis.
Area of Science:
- Cardiology
- Genetics
- Medical Imaging
Background:
- Early diagnosis of cardiomyopathies like Fabry disease is crucial for treatment.
- Echocardiographic "red flags" aid in etiologic diagnosis.
- Differentiating Fabry cardiomyopathy from sarcomeric hypertrophic cardiomyopathy (HCM) is clinically important.
Purpose of the Study:
- To identify echocardiographic features distinguishing Fabry cardiomyopathy from sarcomeric HCM.
- To assess the utility of ventricular strain analysis in this differentiation.
Main Methods:
- Prospective study of 40 patients with left ventricular (LV) hypertrophy.
- Two groups: 20 Fabry disease patients and 20 sarcomeric HCM patients.
- Matched for LV hypertrophy and age; included full echocardiography and strain analysis.
Main Results:
- Fabry group showed lower LV ejection fraction and larger LV end-systolic diameter.
- Fabry patients had more concentric hypertrophy and a lower interventricular septum/posterior wall ratio.
- Reduced inferolateral and RV free wall longitudinal strain observed in Fabry patients.
Conclusions:
- Specific echocardiographic parameters can differentiate Fabry cardiomyopathy from HCM.
- These findings may facilitate earlier detection and management of Fabry disease.
Background:
The concept of "red flags" has been particularly useful in the etiologic diagnosis of cardiomyopathies such as Fabry disease, as early detection is often essential for treatment response and outcomes. The present study sought to describe the echocardiographic features that may differentiate Fabry cardiomyopathy from sarcomeric hypertrophic cardiomyopathy (HCM).
Methods:
Forty patients with left ventricular (LV) hypertrophy were prospectively included and divided into two groups: the Fabry group (20) and the sarcomeric HCM group (20). The two groups were matched for LV hypertrophy (similar maximum wall thickness and indexed LV mass) and age. All patients underwent full echocardiographic evaluation including ventricular strain analysis.
Results:
The Fabry group had significantly lower LV ejection fraction (63 ± 7 vs 72 ± 7%, P = .001) and higher LV end-systolic diameter (28 ± 7 vs 22 ± 5 mm, P = .004). LV hypertrophy in Fabry patients was more often concentric, with a significantly lower interventricular septum/posterior wall ratio (1.22 ± 0.63 vs 1.55 ± 0.66, P = .001). Fabry patients had more reduced regional longitudinal strain in the inferolateral part of the LV (-9 ± 5 vs -16 ± 7%), and RV free wall longitudinal strain was also worse in Fabry patients (-23 ± 6 vs -28 ± 5%, P = .027).
Conclusion:
These parameters are promising echocardiographic features to identify patients with Fabry cardiomyopathy and may help for the detection and subsequent management of these patients.
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