[How far has laser angioplasty gotten?].

Area of Science:

• Cardiovascular Medicine
• Medical Engineering
• Interventional Cardiology

Context:

• Laser angioplasty is being explored for treating occluded arteries.
• Continuous lasers show promise but have limitations like small lumen size and potential arterial wall damage.
• Pulsed lasers offer precise plaque excision with less thermal damage.

Purpose:

• To review the efficacy and limitations of continuous laser angioplasty.
• To explore the potential of pulsed lasers in treating arterial occlusions.
• To compare laser angioplasty with alternative angioplasty systems.

Summary:

• Continuous laser angioplasty successfully repermeabilizes peripheral arteries with low complication rates compared to balloon angioplasty.
• Limitations include suboptimal lumen size, risk of perforation, arterial wall burns, spasm, thrombosis, and resistance to calcified lesions.
• Pulsed lasers, such as excimer and dye lasers, are under investigation for precise atheroma plaque excision, even in calcified lesions, without significant overheating.
• Clinical trials of laser angioplasty for coronary arteries are limited, focusing on continuous "hot-tip" devices.
• Pulsed lasers may be superior in small coronary vessels due to precision and reduced thermal effects.
• Alternative angioplasty systems (atherectomy, drills, radio-frequency, ultrasound) are emerging as user-friendly, cost-effective, and effective options for peripheral and coronary artery disease.

Impact:

• Continuous lasers offer a viable option for peripheral artery revascularization, though often requiring adjunctive balloon angioplasty.
• Pulsed lasers represent a potential advancement for precise plaque removal, particularly in challenging calcified lesions and small vessels.
• The development of diverse angioplasty technologies provides clinicians with a broader range of treatment options for arterial occlusive diseases.