Difference in fibrinolytic activity between multivessel coronary spasm and one-vessel coronary spasm

Area of Science:

• Cardiovascular Medicine
• Hematology
• Biochemistry

Background:

• Coronary artery spasm is a significant cause of angina.
• The fibrinolytic system plays a crucial role in maintaining vascular patency.
• Impairment of the fibrinolytic system may contribute to adverse cardiovascular outcomes.

Purpose of the Study:

• To investigate the activity of plasminogen activator inhibitor (PAI) and tissue plasminogen activator (t-PA) antigen in patients with multivessel coronary spasm compared to single-vessel spasm and controls.
• To explore the relationship between fibrinolytic system activity and clinical outcomes in coronary spasm patients.

Main Methods:

• Assessed plasminogen activator inhibitor activity in patient plasma samples.
• Measured tissue plasminogen activator antigen levels.
• Compared these levels across three groups: multivessel spasm, 1-vessel spasm, and control patients.

Main Results:

• Plasminogen activator inhibitor activity was significantly higher in patients with multivessel spasm (n=18) than in those with 1-vessel spasm (n=20) and control patients (n=22).
• Tissue plasminogen activator antigen levels were also elevated in multivessel spasm patients compared to the other two groups.
• These findings suggest a more pronounced impairment of the fibrinolytic system in multivessel coronary spasm.

Conclusions:

• Multivessel coronary spasm is associated with increased plasminogen activator inhibitor activity, indicating a more severely impaired fibrinolytic system.
• This fibrinolytic impairment may contribute to the higher incidence of refractory angina and adverse cardiac events observed in these patients.
• Further research is warranted to elucidate the precise mechanisms and therapeutic implications.