- ACLS - Advanced Cardiac Certification
- Cardiofind
- Cardiología.net
- Cardiolog-Online
- Cardiologie.nl
- Cardiology.nl - De Educatie-Site voor de Cardioloog
- Cardiology in Review
- Cardiology Today: Current News in Cardiovascular Disease
- Cardiology Associates of New Haven
- Cardiolili - Unidad cardiovascular de / Unidad Clínica Valle de Lili
- The Gross Physiology of the Cardiovascular System
- Heart Online
- MDlinx
- VascularWeb
- Cardiothoracic Surgery (University of Southern California)
- Edwards Lifesciences
- Vermont Medical: disposable EKG, ECG electrodes for use in all cardiac monitoring and diagnostic applications
- ZOLL Medical Corporation: proprietary noninvasice cardiac resuscitation devices, disposable electrods and mobile ECG systems
- Cardiovascular diabetology
- Cardiovascular Research
- Cardiovascular Ultrasound
- Chest Journal
- Circulation (American Heart Association)
- Circulation Research (American Heart Association)
- Current Opinion in Cardiology
- Journal of Clinical and Basic Cardiology
- Nature Clinical Practice: Cardiovascular Medicine
- Nurse Beat: electronic journal for cardiac nurses
- Online Journal of Cardiology
- Thorax Journal
- Belgische Cardiologische Liga
- BSC: Belgian Society of Cardiology
- Canadian Cardiovascular Society
- European Society of Cardiology, Société Européenne de Cardiologie
- Nederlandse Vereniging voor Hart en Vaat Verpleegkundigen
- Société française de cardiologie
- Society for Cardiovascular Angiography and Interventions
- Society of Geriatric Cardiology Web Site
- Vascular Web: Society of vascular surgery
- Vlaamse Cathlab Vereniging (VCV)
- American Heart
- Boldnet: vereniging van obese patiënten
- Nederlandse hartstichting (NL)
