Хария за ЕКГ апарати:
Bionet
Bioset Zwoenitz
Bosch
BTL
Burdick
Cardioline
Cardiorapid
Cardisuny
Corometrics
Edan
Esaote Biomedica
Fukuda Denshi
H&C Cardiette
Hellige/Marquette
HP / Philips
Innomed
Litton
Marquette
Mortara Rangoni
Nihon Kohden
Physio Control
Quinton
Schiller
Siemens
Sonicaid
ST Electromedicina
Toitu
Wakeling