title: Restrictive cardiomyopathy in a patient with primary hyperoxaluria type II.
abstract: This is the first report of a cardiac manifestation of a primary hyperoxaluria type II (PH II) with the hemodynamic characteristics of a severe restrictive cardiomyopathy. PH II is a rare inherited metabolic disease characterized by a deficiency of D-glycerate dehydrogenase, which has also glyoxylate reductase activity. This defect causes an accumulation of hydroxypyruvate the precursor of oxalate. The renal excretion of oxalate is impaired causing a deposition of oxalate mainly in the kidneys. To date, less than fifty cases have been reported. Systemic oxalosis in PH II is an occasional finding; thus far, myocardial oxalosis due to PH II has never been reported. Described is the case of a 41 year old male with renal failure and severe neuropathy of unknown cause, who underwent endomyocardial biopsy under the suspicion of cardiac amyloidosis. Echocardiography and cardiac catheterization showed a severe restrictive cardiomyopathy; endomyocardial biopsy established the diagnosis of oxalosis. Plasma oxalate levels were markedly increased, therefore a liver biopsy was performed. Immunoreactivity for D-glycerate dehydrogenase/ glyoxylate reductase was absent and activity of the enzyme was < 5% of normal. In summary, these findings established the diagnosis of a restrictive cardiomyopathy due to PH II.
authors.affiliation: Technische Universität Dresden, Medizinische Klinik/Kardiologie, Fetscherstrasse 76, 01307 Dresden, Germany. MatthiasR.Schulze@web.de
authors.forename: Matthias R
authors.initials: MR
authors.lastname: Schulze
authors.forename: Rolf
authors.initials: R
authors.lastname: Wachter
authors.forename: Alexander
authors.initials: A
authors.lastname: Schmeisser
authors.forename: Rainer
authors.initials: R
authors.lastname: Fischer
authors.forename: Ruth H
authors.initials: RH
authors.lastname: Strasser
mesh_terms: D000328:Adult; D015415:Biomarkers / Q000097:blood; D002313:Cardiomyopathy, Restrictive / Q000175:diagnosis* / Q000209:etiology* / Q000503:physiopathology; D006801:Humans; D006960:Hyperoxaluria, Primary / Q000097:blood / Q000150:complications* / Q000175:diagnosis*; D017379:Hypertrophy, Left Ventricular / Q000209:etiology / Q000503:physiopathology; D008297:Male; D019815:Oxalic Acid / Q000097:blood; D013318:Stroke Volume; D018487:Ventricular Dysfunction, Left / Q000209:etiology / Q000503:physiopathology; D017725:Ventricular Pressure
chemical_list: D015415:Biomarkers; D019815:Oxalic Acid