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Abstract

Methods and systems for treating patients requiring tissue ablation for volumetric tissue reduction rely on the injection of ethanol and other tissue-ablating agents into the perivascular space surrounding body lumens, particularly blood vessels or vessels of the alimentary canal, reproductive system and urinary tract. Injection of tissue-ablating agents is intended treat conditions such as hypertrophic cardiomyopathy, benign and malignant tumors, benign prostatic hyperplasia, and uterine fibroids, for example. Injection may be achieved using intravascular catheters which advance needles radially outward from a body vessel lumen or by transmyocardial injection from an epicardial or endocardial surface of the heart.

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First Claim