thanks for your help!!=]

You will have to follow the protocol that’s being followed in your cardiac department. In the setup where i work, streptokinese is preferred

so check that with your professor, and do update me too, you can comment on this same page when you get the update.

then should I give heparin to all patient presenting with STEMI, while considering tPA only when it is <12hr (PCI not available or contraindicated)?

ok in practical sense, both mean the same thing, people usually use only 1 term to cover both types, fibrinolytics and thrombolytics.

Which drug to prescribe depends on various other factors.

I have read that for patient presenting as STEMI, if PCI is not possible, thrombolysis can be considered within 12 hr. But some other sources stated fibrinolyic should be used. I have also checked that heparin is considered as thrombolytic, while tPA, streptokinase and urokinase are considered as fibrinolytic. Then i am confused when should I give which medication? and whether thromboytic are equal to fibrinolytic in this context? if yes, which drug should I actually prescribe?

I don’t think there should be any practical difference. As the choice of treatment is based on different factors, including: time since cardiac event and the exact symptoms.

So what exactly is the query, elaborate that so that i can guide you in that exact context.

Heparin is an anticoagulant, with indirect thrombolytic affect.

This has been nicely explained here: http://drsvenkatesan.com/tag/heparin-as-a-thrombolytic-agent/ with references too.

Heparin is an anticoagulant indeed, but it has thrombolytic affect too.

Heparin is an anticoagulant it prevents clot formation it does not lyse the clot

Heparin acts as an anticoagulant by activating
antithrombin (previously known as antithrombin III) and accelerating
the rate at which antithrombin inhibits clotting enzymes,
particularly thrombin and factor Xa.

From Harrison 18th edition