1. Department of Electrocardiology and Heart Failure, Medical University of Silesia, Katowice, Poland
2. Department of Electrocardiology, Upper-Silesian Medical Centre, Katowice, Poland
3. Department of Rehabilitation, Medical University of Silesia, Katowice, Poland
4. Day Treatment Cardiac Rehabilitation Ward, Upper-Silesian Medical Centre, Katowice, Poland
5. Cardiac Rehabilitation Ward, Hospital Murcki, Katowice, Poland