Fabry disease with pacemaker implantation as the initial event

Fabry disease (FD) is a rare X-linked hereditary disorder (Xq22) caused by a deficiency in alphagalactosidase activity. A 34-year-old man was referred to our hospital because of renal dysfunction. He had previously undergone pacemaker implantation at 24 years of age. Investigations revealed undetectable alphagalactosidase A activity levels. Renal biopsy results indicated vacuolization of podocytes. A genetic analysis revealed that the patient carried the W340X mutation. Enzyme replacement therapy with agalsidase beta was started. This case is novel because most cases of FD nephropathy precede cardiac disease. In our patient, the cardiac event was the initial event, and renal impairment followed.