Summary
Fractional hydrolysis and acetylation of procainamide, acetylation of procainamide-derived p-aminobenzoic acid and plasma hydrolysis of procaine were studied in 20 patients with chronic heart failure (CHF), 20 patients with chronic respiratory insufficiency (CRI) and 20 patients with chronic renal failure (RF). The results were compared with those obtained in a group of 20 normal volunteers. Hydrolysis of procainamide and procaine were reduced in patients with CHF and CRI, but not in patients with RF. Moreover, more marked decreases in procainamide and procaine hydrolysis were seen in subgroups with secondary hepatic dysfunction. The diminution of hydrolysis of procainamide was not paralleled by changes in acetylation of procainamide or p-aminobenzoic acid. It is concluded that in patients with hepatic involvement secondary to advanced CHF or CRI, hepatic and plasmatic hydrolysis activity is decreased to a degree equivalent to primary liver failure.
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Supported in part by a grant from Centre de Recherche Merrell International.
Recipient of a Merck Sharp & Dohme International Fellowship in Clinical Pharmacology.
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du Souich, P., Erill, S. Metabolism of procainamide in patients with chronic heart failure, chronic respiratory failure and chronic renal failure. Eur J Clin Pharmacol 14, 21–27 (1978). https://doi.org/10.1007/BF00560254
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DOI: https://doi.org/10.1007/BF00560254