1. Department of Electrocardiology and Heart Failure, Medical University of Silesia, 40-635 Katowice, Poland
2. Department of Electrocardiology, Upper-Silesian Medical Centre, 40-635 Katowice, Poland
3. Department of Thoracic Surgery, Medical University of Silesia, 40-055 Katowice, Poland
4. 2nd Department of Radiology, Medical University of Gdansk, 80-210 Gdansk, Poland