Streptokinase alters myocardial creatine kinase depletion after ischaemia and reperfusion in rabbits.

Abstract:

:The efficacy of streptokinase as an intracoronary thrombolytic agent is well-recognized. The effect of streptokinase, distinct from its thrombolytic action, on ischaemic myocardium distal to an area of coronary artery occlusion when reperfusion occurs has not been well-defined. In order to do this, myocardial creatine kinase depletion and the histopathology of infarctions produced in rabbits after 1 h of circumflex coronary artery occlusion and mechanical release of the occlusion were assessed. Streptokinase or saline was infused intravenously for 1 h beginning 0.5 h after occlusion. Rabbits were divided into two time intervals: early (less than 10 h) and late (24 h) after release of coronary artery occlusion. When streptokinase was infused in early infarctions, haemorrhage did not correlate with infarction cross-sectional area or myocardial creatine kinase depletion. However, myocardial creatine kinase depletion was 40% less when streptokinase was infused than when saline was infused, suggesting that streptokinase might limit infarct size. In late infarctions, the degree of haemorrhage, infarction cross-sectional area, and myocardial creatine kinase depletion were similar after reperfusion with streptokinase or saline. By 24 h, the beneficial effect of a single dose of streptokinase given early in the course of occlusion-reperfusion myocardial injury was no longer evident in limiting infarct size.

authors

Mickelson JK,Carlson CJ,Margaretten W,Rapaport E

doi

10.1111/j.1440-1681.1986.tb02392.x

subject

Has Abstract

pub_date

1986-09-01 00:00:00

pages

637-46

issue

9

eissn

0305-1870

issn

1440-1681

journal_volume

13

pub_type

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