Reduction of Myocardial Necrosis After Glycosaminoglycan Administration: Effects of a Single Intravenous Administration of Heparin or N-Acetylheparin 2 Hours Before Regional Ischemia and Reperfusion.

Abstract:

:BACKGROUND: We determined if a single administration of heparin or nonanticoagulant N-acetylheparin could reduce myocardial injury resulting from a 90-minute occlusion of the left circumflex coronary artery (LCX) and 6 hours of reperfusion in the anesthetized canine. METHODS AND RESULTS: Heparin (2 mg/kg), N-acetylheparin (2 mg/kg), or vehicle, 0.9% sodium chloride (control), was administered intravenously to separate groups of animals 2 hours before LCX occlusion. To ensure parity of LCX ischemia, only animals with ischemic zone regional blood flow < 0.16 mL/min/g tissue were included in the final analysis. Hemodynamics did not differ among the three study groups. Infarct size as a percentage of the left ventricular area at risk was obtained for each group. Myocardial infarct size was 43.0 +/- 3.9% in the vehicle, 28.8 +/- 5.8% in the heparin (P <.05 vs vehicle) and 24.7 +/- 4.6% (P <.05 vs vehicle) in the N-acetylheparin-treated animals. CONCLUSIONS: Pretreatment with heparin or its nonanticoagulant derivative, N-acetylheparin, provides significant protection to the regionally ischemic and reperfused canine myocardium independent of either plasma glycosaminoglycan concentration or alterations in the coagulation system.

authors

Gralinski MR,Driscoll EM,Friedrichs GS,DeNardis MR,Lucchesi BR

doi

10.1053/jcpt.1996.0219

keywords:

subject

Has Abstract

pub_date

1996-07-01 00:00:00

pages

219-228

issue

3

eissn

1074-2484

issn

1940-4034

pii

S1074248496000235

journal_volume

1

pub_type

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