| 摘要 |
The invention relates to an angioplasty guiding catheter and methods for performing coronary angioplasty on a patient, to dilate constrictions in blood vessels. The guiding catheter has an elongated first member having at least one lumen therethrough and a tip, at least one leg member, coupled to the first member, radially extendable from a retracted position generally in contact with the first member to an extended position generally away from the first member, for abutment against an internal wall of patient's cardiovascular system, and means for extending the leg member from the retracted position to the extended position, coupled to the leg member. The angioplasty methods of the present invention involves entering the patient's cardiovascular system, pericutaneously patient's cardiovascular system to a desired translating through the location proximate a constriction in a blood vessel, abutting against an internal wall of the cardiovascular system, advancing towards the constriction in a direction generally opposite the abutting, for overcoming resistance by the constriction to the advancing and dilating the vessel at the constriction site.
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