| 摘要 |
<p>Devices and methods for creating a series of percutaneous myocardial revascularization (PMR) channels in the heart. One method includes forming a pattern of channels in the myocardium leading from healthy tissue to hibernating tissue. Suitable channel patterns include lines and arrays. One method includes anchoring a radiopaque marker (38) to a position in the ventricle wall, then using fluoroscopy repeatedly to guide positioning of a cutting tip (32) in the formation of multiple channels. Another method uses radiopaque material injected into each channel formed, as a marker (38). Yet another method utilizes an anchorable, rotatable cutting probe (30) for channel formation about an anchor. Still another method utilizes a multiple wire radio frequency burning probe, for formation of multiple channels simultaneously. Still another method utilizes liquid nitrogen to cause localized tissue death.</p> |
