Ischemic and Nonischemic Tissue Concentrations of Felodipine After Coronary Venous Retroinfusion During Myocardial Ischemia and Reperfusion
| Autor: | Nobuo Hatori, Lars Johansson, Lars Rydén, Jan-Arne Björkman, Yozo Uriuda, Per-Ove Sjöquist, Yoshiyuki Haga, Rolf Nordlander |
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| Rok vydání: | 1994 |
| Předmět: |
Male
medicine.medical_specialty Swine Myocardial Ischemia Ischemia chemistry.chemical_element Myocardial Reperfusion Calcium Pharmacokinetics Internal medicine Blood plasma medicine Animals Pharmacology Coronary Vein Felodipine business.industry Myocardium Antagonist Dihydropyridine medicine.disease chemistry Anesthesia Cardiology Female Cardiology and Cardiovascular Medicine business medicine.drug |
| Zdroj: | Journal of Cardiovascular Pharmacology. 24:298-302 |
| ISSN: | 0160-2446 |
| DOI: | 10.1097/00005344-199408000-00016 |
| Popis: | Tissue and plasma concentrations of felodipine, a dihydropyridine (DHP) calcium antagonist, retroinfused through the coronary venous system were studied in 27 pigs. The animals underwent 45-min myocardial ischemia followed by 4-h reperfusion. Felodipine (7 nmol/kg body weight) was administered in the coronary vein for 30 min, 5 min before reperfusion. Concentrations of felodipine in the ischemic and nonischemic myocardium and in plasma were determined by gas chromatography. In the ischemic area, felodipine concentration at start of reperfusion was 304 +/- 285, 171 +/- 160, and 52 +/- 47 nmol/kg (mean +/- SD) in the subepicardial, midmyocardial, and subendocardial layer, respectively. Corresponding concentrations in the nonischemic area were 15 +/- 13, 17 +/- 14, and 16 +/- 15 nmol/kg (p < 0.05 vs. ischemic area). Subepicardial concentration was highest at start of reperfusion, whereas concentrations in other layers peaked at the end of retroinfusion. The transmural concentration gradient of felodipine in the ischemic area decreased progressively during the reperfusion period. The nonischemic tissue concentration increased slightly during the reperfusion period. The plasma concentration was very low throughout the study (peak = 3.2 +/- 1.4 nM at 30 min). Coronary venous retroinfusion of felodipine resulted in profound accumulation of the drug, specifically in ischemic myocardium. The plasma concentration was low and did not affect systemic hemodynamics. Coronary venous retroinfusion is considered an advantageous technique for selective drug delivery. |
| Databáze: | OpenAIRE |
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