Major advances in cardiovascular medicine have been driven by innovations in basic research in biological and technical sciences. Despite the clear evidence regarding the treatments that have been demonstrated to be useful to improve patients' outcomes, their transferability to everyday clinical practice seems to be at least suboptimal. The European Society of Cardiology (ESC), therefore, planned to support a program, denominated EuroHeart, for continuous data collection of standardized and/or harmonized variables in common cardiovascular diseases, such as ACS, HF and A Fib. EuroHeart is an observational, prospective, multicentre initiative with continuous data collection in consecutive patients with ACS, HF and A Fib to support continuous quality of care improvement through the evaluation of quality indicators (QIs) defined by the ESC. All patients included in the EuroHeart initiative, will enter a 12 month longitudinal follow-up with the collection of clinical events and clinical status data.