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The various atrial shunt devices and shunts without implants currently under investigation for treatment of heart failure. (a) Corvia Atrial Shunt, IASD System II, (b) V-Wave Ventura Interatrial shunt, (c) Occlutech atrial flow regulator, (d) Edwards Life Sciences, (e) Alleviant, (f) Intershunt, (g) NoYa.
