Individual dosage of digoxin in patients with heart failure

S. Muzzarelli*, Bruno H Stricker, O. Pfister, P. Foglia, G. Moschovitis, G. Mombelli, H. Brunner-La Rocca

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Aim: This study was aimed to test the Konishi equation in Caucasians specifically targeting low SDCs. Furthermore, the Konishi equation was compared with other frequently used equations. Design: This was a prospective, multicenter study. Methods: Clinically indicated digoxin was given in 40 HF patients. The dosage was calculated with the Konishi equation. The SDC was measured at 1 and 6 months after starting digoxin. Adherence to digoxin was monitored with a specific questionnaire. Results: After exclusion of patients admitting poor adherence, we found a reasonable correlation between predicted and measured SDC (r = 0.48; P <0.01) by the Konishi equation. Excluding patients with poor adherence and relevant worsening of renal function, the measured SDC (n = 54 measurements) was within the pre-defined therapeutic range in 95% of the cases. The mean, maximal and minimal measured SDC were 0.69 +/- 0.19, 1.00 and 0.32 ng/ml, respectively. The correlation was weaker for the Jelliffe, the Koup and Jusko, and the Bauman equations. Conclusions: This study supports the clinical validity of the Konishi equation for calculating individual digoxin dosage in Caucasians, targeting SDCs according to current HF guidelines.
Original languageEnglish
Pages (from-to)309-317
JournalQJM: An International Journal of Medicine
Volume104
Issue number4
DOIs
Publication statusPublished - Apr 2011

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