and if indicative of FD, molecular testing. Genetic testing involved ␣-GalA mutation searching for cardiac mutations responsible for atypical FD. Results: Seven out of 405 (1.7%) participants had ␣-GalA levels in 0.2-2.3 range and required further mutation testing; 2 of these were confirmed as FD despite being under routine cardiac care. Hence, the prevalence of undiagnosed FD in this population was 0.5% Conclusion: FD is under diagnosed in patients with unexplained LVH. Simple and inexpensive testing measures for ␣-GalA may be employed using DBS methods to reduce the number of patients with undiagnosed FD in this population.
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