Delivery of intramyocardial diffused laser light for treatment of postinfarction ventricular tachycardia

David Lochridge Ware M.D.; Chunjie Yang M.D.; Ashok Gowda; Brent A. Bell; Paul Boor M.D.; Massoud Motamedi

doi:10.1117/12.275029

22 May 1997 Delivery of intramyocardial diffused laser light for treatment of postinfarction ventricular tachycardia

David Lochridge Ware M.D., Chunjie Yang M.D., Ashok Gowda, Brent A. Bell, Paul Boor M.D., Massoud Motamedi

Proceedings Volume 2970, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VII; (1997) https://doi.org/10.1117/12.275029
Event: BiOS '97, Part of Photonics West, 1997, San Jose, CA, United States

Abstract

Ventricular tachycardia (VT) is a rapid and life-threatening cardiac arrhythmia that most often occurs after healing of myocardial infarction. The same catheter techniques that use resistive endocardial heating to treat supraventricular tachycardias are less effective against post-infarction VT, in part because cure of the latter arrhythmia requires large volume, deep tissue coagulation. Greater risk may also be incurred when standard percutaneous methods are used to induce deep tissue heating, because excess endocardial damage can cause mural thrombi, and a large area of non-lethal endocardial injury may itself generate VT. To address these problems we have developed a unique optical fiber for direct intramyocardial photocoagulation which, when coupled to a diode laser (805 nm), can generate lesions up to 1 cm deep and wide without disruption of the endocardium. With further refinement this system may effectively and safely cure post- infarction VT.

Citation Download Citation

David Lochridge Ware M.D., Chunjie Yang M.D., Ashok Gowda, Brent A. Bell, Paul Boor M.D., and Massoud Motamedi "Delivery of intramyocardial diffused laser light for treatment of postinfarction ventricular tachycardia", Proc. SPIE 2970, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VII, (22 May 1997); https://doi.org/10.1117/12.275029

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KEYWORDS

Tissues

Optical fibers

Laser coagulation

Tissue optics

Heart

Natural surfaces

Semiconductor lasers

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