[Thrombolysis accelerated by ultrasound and microbubbles]

Area of Science:

• Biomedical Engineering
• Cardiovascular Research
• Acoustic Medicine

Context:

• Current therapeutic ultrasound applications are limited, primarily to dental, physiotherapy, and lithotripsy procedures.
• Emerging research indicates ultrasound's potential to accelerate clot dissolution, a critical factor in cardiovascular disease treatment.
• Existing thrombolytic therapies face challenges, including limited efficacy and potential for reocclusion.

Purpose:

• To explore the potential of ultrasound-accelerated thrombolysis for cardiovascular diseases.
• To investigate the mechanisms by which ultrasound enhances clot dissolution, focusing on acoustic cavitation and microbubble interactions.
• To evaluate the safety and efficacy of combining ultrasound with microbubbles and fibrinolytic agents.

Summary:

• Ultrasound accelerates clot dissolution, with effects modulated by intensity and frequency; moderate intensities and low frequencies show better tolerance and efficacy.
• Acoustic cavitation, enhanced by microbubbles, strengthens enzymatic clot breakdown, facilitating recanalization in conditions like ischemic stroke.
• Novel microbubbles that bind to thrombi can further improve ultrasound-mediated thrombolysis, suggesting a synergistic therapeutic approach.

Impact:

• Ultrasound-accelerated thrombolysis offers a novel therapeutic strategy for acute myocardial infarction and ischemic stroke.
• The combination of ultrasound, microbubbles, and fibrinolytic agents holds significant promise for treating diverse cardiovascular diseases.
• This approach could lead to improved recanalization rates and reduced complications compared to current thrombolytic therapies.