Thrombus aspiration during primary percutaneous coronary intervention for preserving the index of microcirculatory...

Area of Science:

• Cardiology
• Interventional Cardiology
• Cardiovascular Research

Background:

• ST-elevation myocardial infarction (STEMI) is a critical condition requiring prompt reperfusion.
• Microcirculatory dysfunction can occur despite successful epicardial artery reperfusion in STEMI.
• Index of Microcirculatory Resistance (IMR) is a key marker for assessing microvascular impairment.

Purpose of the Study:

• To evaluate the impact of thrombus aspiration on Index of Microcirculatory Resistance (IMR) after primary percutaneous coronary intervention (PCI) in STEMI patients.
• To determine if thrombus aspiration preserves microvascular integrity and improves myocardial function post-STEMI.

Main Methods:

• A randomized controlled trial involving 63 STEMI patients undergoing primary PCI.
• Patients were assigned to either primary PCI with thrombus aspiration or primary PCI alone.
• IMR was measured using a pressure-temperature sensor-tipped coronary wire; echocardiography assessed ejection fraction (EF) and wall motion score index (WMSI).

Main Results:

• The thrombus aspiration group showed significantly lower IMR (23.5±10.2 U vs. 34.2±21.7 U, p=0.018).
• Significant improvements in %ΔEF (3.33±4.6% vs. 0.73±1.9%, p=0.005) and %ΔWMSI (-0.121±0.16 vs. -0.004±0.07, p=0.001) were observed in the aspiration group at six-month follow-up.
• No significant baseline differences in EF or WMSI were noted between groups.

Conclusions:

• Thrombus aspiration as an adjunct to primary PCI in STEMI patients may preserve microvascular integrity.
• This adjunctive therapy demonstrated beneficial effects on myocardial microcirculation and function.
• Thrombus aspiration is a potential strategy to improve outcomes in STEMI management.