| http://www.w3.org/ns/prov#value | - Accordingly, there is a need to provide method and apparatus for alleviating stenosis of the pulmonary and other veins, that may be caused by other ablation treatment of cardiac arrhythmias.SUMMARY OF THE INVENTIONThe present invention is directed, in one aspect, to methods and apparatus which employ ionizing radiation for ablating heart tissue to treat cardiac arrhythmias, including without limit
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