Professional societies

British Cardiac Society
British Hypertension Society
British Society for Echocardiography
European Society of Cardiology
British Cardiovascular Intervention Society
American Heart Association
American College of Cardiology
British Heart Foundation
Canadian Cardiovascular Society
Heart Rhythm Society
​Medcon

Calculators 

Thrombosis Canada Tools and Calculators
Euroscore
STS Score
Syntax Score
Framingham Risk Score
QRISK2 Score
CHADS2VASC Score
NNT-Summaries of Evidenced based medicine
Seattle Heart Failure Model 

Guidelines

ESC Guideline Atrial fibrillation
NICE: Recent onset chest pain
Hypertension
Acute Coronary Syndromes

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