1. Unstable ischemic heart disease, 2. Significant haemodynamic aortic stenosis, 3. Valve defects requiring surgical correction, 4. Complex ventricular arrhythmias, 5. Implantation of a cardiac pacemaker, cardioverter-defibrillator (ICD) and cardiac re-synchronizing pacemaker (CRT), 6. Acute myocarditis or pericarditis, 7. Uncontrolled hypertension, 8. End-stage renal disease and liver failure disease, 9. Lack of consent to participate in the study.

1. Unstable ischemic heart disease, 2. Significant haemodynamic aortic stenosis, 3. Valve defects requiring surgical correction, 4. Complex ventricular arrhythmias, 5. Implantation of a cardiac pacemaker, cardioverter-defibrillator (ICD) and cardiac re-synchronizing pacemaker (CRT), 6. Acute myocarditis or pericarditis, 7. Uncontrolled hypertension, 8. End-stage renal disease and liver failure disease, 9. Lack of consent to participate in the study.