TOKYO--(BUSINESS WIRE)--Astellas US Holding, Inc., a wholly owned subsidiary of Astellas Pharma Inc., today announced that it has filed a lawsuit in the Delaware Chancery Court against CV Therapeutics Inc. (Nasdaq: CVTX) and its directors seeking, among other things, declaratory and injunctive relief to (i) prevent CV Therapeutics from applying its recently amended stockholders rights plan in a way that would prevent CV Therapeutics’ stockholders from tendering their shares into the tender offer announced by Astellas today and (ii) preclude CV Therapeutics from claiming that a 2000 agreement between Astellas and CV Therapeutics has been violated by the Astellas tender offer.