Study: NCT04886713

Intervention type: DIAGNOSTIC_TEST
Intervention: Adipose and myocardial tissue sampling
Description: After median sternotomy tissue samples will be collected from the epicardial space, the abdominal wall and the myocardium.

Intervention type: DIAGNOSTIC_TEST
Intervention: Adipose and myocardial tissue sampling
Description: After median sternotomy tissue samples will be collected from the epicardial space, the abdominal wall and the myocardium.

Intervention type: DIAGNOSTIC_TEST
Intervention: Adipose and myocardial tissue sampling
Description: After median sternotomy tissue samples will be collected from the epicardial space, the abdominal wall and the myocardium.

Intervention type: DIAGNOSTIC_TEST
Intervention: Cardiac magnetic resonance imaging
Description: Magnetic resonance imaging will be performed at 1.5 Tesla ('Intera', Philips Medical Systems, Best, The Netherlands). All subjects will be examined in the supine position with initial anatomy scans to cover the thorax to the first sacral vertebrae. The magnetic resonance imaging protocol is summarized in Figure 4.~The following imaging parameters will be acquired:~* Biventricular end-diastolic and end-systolic volume, ejection fraction, stroke volume~* Biventricular mass, wall thickness~* T1 mapping; native and \> 10 minutes post contrast injection as an estimate of left ventricular diffuse fibrosis and extracellular volume~* Late enhancement for detection of regional fibrosis and scar~* Myocardial feature tracking for analysis of deformation/motion~* Epicardial fat volume

Intervention type: DIAGNOSTIC_TEST
Intervention: Cardiac magnetic resonance imaging
Description: Magnetic resonance imaging will be performed at 1.5 Tesla ('Intera', Philips Medical Systems, Best, The Netherlands). All subjects will be examined in the supine position with initial anatomy scans to cover the thorax to the first sacral vertebrae. The magnetic resonance imaging protocol is summarized in Figure 4.~The following imaging parameters will be acquired:~* Biventricular end-diastolic and end-systolic volume, ejection fraction, stroke volume~* Biventricular mass, wall thickness~* T1 mapping; native and \> 10 minutes post contrast injection as an estimate of left ventricular diffuse fibrosis and extracellular volume~* Late enhancement for detection of regional fibrosis and scar~* Myocardial feature tracking for analysis of deformation/motion~* Epicardial fat volume

Intervention type: DIAGNOSTIC_TEST
Intervention: Cardiac magnetic resonance imaging
Description: Magnetic resonance imaging will be performed at 1.5 Tesla ('Intera', Philips Medical Systems, Best, The Netherlands). All subjects will be examined in the supine position with initial anatomy scans to cover the thorax to the first sacral vertebrae. The magnetic resonance imaging protocol is summarized in Figure 4.~The following imaging parameters will be acquired:~* Biventricular end-diastolic and end-systolic volume, ejection fraction, stroke volume~* Biventricular mass, wall thickness~* T1 mapping; native and \> 10 minutes post contrast injection as an estimate of left ventricular diffuse fibrosis and extracellular volume~* Late enhancement for detection of regional fibrosis and scar~* Myocardial feature tracking for analysis of deformation/motion~* Epicardial fat volume

Intervention type: DIAGNOSTIC_TEST
Intervention: Cardiopulmonary exercise testing
Description: After completion of a regular cardiac rehabilitation program patients are scheduled to undergo their discharge examination at 3 to 4 weeks after the operation in order to be functionally characterized. Cardiopulmonary exercise testing will be performed, if possible by patients condition, on a mechanically braked bicycle ergometer and respiratory gas exchange analysis via a mouthpiece or facemask.

Intervention type: DIAGNOSTIC_TEST
Intervention: Cardiopulmonary exercise testing
Description: After completion of a regular cardiac rehabilitation program patients are scheduled to undergo their discharge examination at 3 to 4 weeks after the operation in order to be functionally characterized. Cardiopulmonary exercise testing will be performed, if possible by patients condition, on a mechanically braked bicycle ergometer and respiratory gas exchange analysis via a mouthpiece or facemask.

Intervention type: DIAGNOSTIC_TEST
Intervention: Cardiopulmonary exercise testing
Description: After completion of a regular cardiac rehabilitation program patients are scheduled to undergo their discharge examination at 3 to 4 weeks after the operation in order to be functionally characterized. Cardiopulmonary exercise testing will be performed, if possible by patients condition, on a mechanically braked bicycle ergometer and respiratory gas exchange analysis via a mouthpiece or facemask.