[Myocardial involvement in Fabry's disease (author's transl)].

Definitely impaired coronary reserve, as recorded in cases with coronary microangiopathy, was demonstrated in a 48-year-old female non-smoker with angina, positive ECG exercise tolerance test and negative coronary angiography with normal coronary circulation at rest. Myocardial biopsy from the right ventricle demonstrated electron-microscopically the lamellar, intracytoplasmic inclusion bodies described in Fabry's disease. This diagnosis of an X-chromosomal recessive metabolic disorder with prominent myocardial involvement was confirmed by the results of further investigations.