Relationship of changes in felodipine pharmacokinetics to haemodynamics during chronic oral treatment of congestive heart failure patients
| Autor: | A. H. J. Scaf, Harry Wesseling, P. H. J. M. Dunselman |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
medicine.medical_specialty
Time Factors Heart disease Vasodilator Agents Hemodynamics Administration Oral Pharmacokinetics Double-Blind Method Internal medicine medicine Distribution (pharmacology) Humans Pharmacology (medical) Pharmacology Heart Failure Felodipine business.industry Therapeutic effect Dihydropyridine General Medicine medicine.disease Calcium Channel Blockers Endocrinology Heart failure Injections Intravenous Cardiology business medicine.drug |
| Zdroj: | European journal of clinical pharmacology. 49(3) |
| ISSN: | 0031-6970 |
| Popis: | In congestive heart failure patients the kinetics of felodipine, a dihydropyridine calcium antagonist, show interpatient differences after acute i.v. administration that disappear after 8 weeks oral treatment with a change in kinetics in the patients with the largest clearances (CL) and the smallest volumes of distribution (V SS). Pharmacokinetic and haemodynamic data were combined to construct a haemodynamic-pharmacokinetic model. This model shows that the differences between the patients in i.v. pharmacokinetics are consistent with a difference in plasma flow distribution between liver and poorly perfused tissues. In patients in whom kinetics changed, felodipine treatment is supposed to cause a redistribution of flow from liver to peripheral tissues, accompanied by a decreased work load of the heart and a larger increase in VO2max during therapy than in the other patients, whose workload increased. This suggests a better therapeutic response in the patients whose kinetics changed. As change in kinetics is related to felodipine CL and CL to liver plasma flow, felodipine CL or even indocyanine CL might be predictive for the therapeutic effect of felodipine. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink