Cambridge Heart, Inc.
- Develops equipment for non-invasive cardiac diagnostics. Includes detailed information for physicians,patients and investors, with contacts in Bedford, Massachusetts. (OTC: CAMH)
- http://www.cambridgeheart.com/

Medical Positioning, Inc.
- Manufactures and markets Echocardiography and Cardiology patient imaging tables.
- http://www.medicalpositioning.com

Cardio-Vascular Sales
- Dealers and distributors of refurbished used echocardiography and ultrasound equipment or systems, transducers, parts and service repair.
- http://www.cvsales.com/

Echo-Web
- Online Education, CMEs, CEUs, job opportunities, career connections, online resumes, conferences and seminars, echocardiography links, technology news, and other materials for echocardiographers.
- http://www.echo-web.com