| Autor: |
J M, Maixent, I, Berrebi Bertrand, L G, Lelièvre, S, Fénard |
| Rok vydání: |
1992 |
| Předmět: |
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| Zdroj: |
Arzneimittel-Forschung. 42(11) |
| ISSN: |
0004-4172 |
| Popis: |
20R 14 beta-amino 3 beta-rhamnosyl 5 beta-pregnan 20 beta-ol (LND 623, CAS 90520-42-6) was investigated and compared to digoxin in anesthetized dogs. The hemodynamic profiles showed: a) a pure positive inotropic action of LND-623; b) its potency was four-fold higher than that of digoxin and more marked in heart failure; c) its duration of action was maintained for at least 6 h. The onset and reversal of the inotropic effects of a single dose (3.3 nmol.kg-1.min-1) were faster with LND-623 than those of digoxin. This reversal is consistent with the faster dissociation profile observed at the level of the high affinity cardiac Na+,K(+)-ATPase receptor form. The advantage of LND-623 over digoxin resides in its larger therapeutic index (ratio of arrhythmogenic to inotropic responses) in anesthetized dogs with propranolol-induced heart failure. This index was 6 for LND-623 and 2 for digoxin. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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