Apparatus and methods are disclosed for inserting electrical leads within a heart. In one aspect of the present invention, a method for positioning a medical electrical lead in a cardiac vein is disclosed. The method comprises inserting a lead within a coronary sinus, dispersing at least one vasodilating...http://www.google.com/patents/US6936040?utm_source=gb-gplus-sharePatent US6936040 - Method and apparatus for endovenous pacing lead
