A HUMAN NECESSITIES
A61 MEDICAL OR VETERINARY SCIENCE; HYGIENE
A61N ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
A61N1/00 Electrotherapy; Circuits therefor
A61N1/05 for implantation or insertion into the body, e.g. heart electrode
A61N1/056 Transvascular endocardial electrode systems
A61N1/057 Anchoring means; Means for fixing the head inside the heart
A61N1/0573 chacterised by means penetrating the heart tissue, e.g. helix needle or hook