Combination thrombolytic therapy: a comparison of simultaneous and sequential regimens of tissue plasminogen...

Area of Science:

• Cardiology
• Interventional Cardiology
• Thrombolytic Therapy

Background:

• Coronary angioplasty after failed tissue plasminogen activator (t-PA) therapy for acute myocardial infarction is linked to high reocclusion rates and mortality.
• Pre-angiography combination therapy with t-PA and urokinase shows promise in reducing post-angioplasty reocclusion.

Purpose of the Study:

• To compare the long-term patency of infarct-related arteries following three different thrombolytic strategies during rescue angioplasty for acute myocardial infarction.
• To evaluate the effectiveness of intraprocedural urokinase in improving outcomes compared to t-PA monotherapy or pre-angiographic combination therapy.

Main Methods:

• Retrospective comparison of three groups of patients undergoing rescue coronary angioplasty.
• Group 1: t-PA monotherapy (n=86).
• Group 2: Sequential t-PA/urokinase therapy (n=24).
• Group 3: Simultaneous t-PA/urokinase therapy (n=34).

Main Results:

• No significant difference in immediate post-angioplasty patency rates of the infarct-related artery was observed among the three groups.
• The sequential t-PA/urokinase group had a lower reocclusion rate (13%) than the t-PA alone group (29%) but a higher rate than the simultaneous therapy group (2%).
• The difference in reocclusion rates between the groups was statistically significant (p = 0.003).

Conclusions:

• Intraprocedural urokinase during rescue angioplasty does not improve immediate vessel patency compared to t-PA monotherapy.
• Sequential t-PA/urokinase therapy offers an intermediate reocclusion rate between t-PA monotherapy and simultaneous t-PA/urokinase therapy.
• Simultaneous t-PA/urokinase therapy appears most effective in preventing reocclusion after rescue angioplasty for acute myocardial infarction.