PMID- 2419700 OWN - NLM STAT- MEDLINE DCOM- 19860331 LR - 20190724 IS - 0160-2446 (Print) IS - 0160-2446 (Linking) VI - 8 IP - 1 DP - 1986 Jan-Feb TI - Protection by the calcium antagonist tiapamil, against cardiac lymphatic enzyme leakage and arrhythmias in canine hearts during reperfusion. PG - 90-8 AB - We examined the effects of tiapamil, a Ca2+ antagonist, on infarct size, lymphatic enzyme release, and arrhythmias in reperfused, ischemic canine hearts. Three-hour reperfusion of the left anterior descending coronary artery, which had been ligated for 3 h, significantly increased cardiac lymphatic release of lactate dehydrogenase (LDH), cathepsin D and creatine phosphokinase (CPK), and the incidence of ventricular premature contractions (VPCs), the increases being markedly higher than those in ligation period. Tiapamil, at the i.v. dose of 3 mg/kg/h for 6 h during the ligation and reperfusion periods markedly reduced these increases in lymphatic levels of LDH and cathepsin D and in VPCs, and significantly decreased infarct size. Tiapamil treatment only during the ligation period had similar preserving effects, but tiapamil treatment only during reperfusion did not. These results suggest that blockade of the Ca2+ channel must be achieved during the early phase of an ischemic episode in order to prevent myocardial deterioration during reperfusion. FAU - Matsuura, A AU - Matsuura A FAU - Ishihara, T AU - Ishihara T FAU - Nakamura, K AU - Nakamura K FAU - Himori, N AU - Himori N FAU - Nakamura, K AU - Nakamura K LA - eng PT - Comparative Study PT - Journal Article PL - United States TA - J Cardiovasc Pharmacol JT - Journal of cardiovascular pharmacology JID - 7902492 RN - 0 (Calcium Channel Blockers) RN - 0 (Propylamines) RN - EC 1.1.1.27 (L-Lactate Dehydrogenase) RN - EC 2.7.3.2 (Creatine Kinase) RN - EC 3.4.23.5 (Cathepsin D) RN - V824N2T753 (Tiapamil Hydrochloride) SB - IM MH - Animals MH - Arrhythmias, Cardiac/etiology/*prevention & control MH - Calcium Channel Blockers/pharmacology MH - Cathepsin D/metabolism MH - Coronary Disease/*drug therapy/physiopathology MH - Creatine Kinase/metabolism MH - Dogs MH - Female MH - L-Lactate Dehydrogenase/metabolism MH - Lymphatic System/drug effects/enzymology MH - Male MH - Myocardial Infarction/drug therapy/pathology/physiopathology MH - Propylamines/administration & dosage/*pharmacology MH - Tiapamil Hydrochloride MH - Time Factors EDAT- 1986/01/01 00:00 MHDA- 1986/01/01 00:01 CRDT- 1986/01/01 00:00 PHST- 1986/01/01 00:00 [pubmed] PHST- 1986/01/01 00:01 [medline] PHST- 1986/01/01 00:00 [entrez] AID - 10.1097/00005344-198601000-00015 [doi] PST - ppublish SO - J Cardiovasc Pharmacol. 1986 Jan-Feb;8(1):90-8. doi: 10.1097/00005344-198601000-00015.