Key Players: (this may not be a complete list and extra companies can be added upon request)

Medtronic plc
Boston Scientific Corporation
Abbott Laboratories
BIOTRONIK SE & Co. KG
LivaNova PLC
MicroPort Scientific Corporation
Koninklijke Philips N.V.
Nihon Kohden Corporation
Zoll Medical Corporation
St. Jude Medical Inc. (acquired by Abbott)