This short movie shows the dynamic reconstruction of the blood flow of a healthy human heart. New imaging methods for flow visualizations as shown are integrated into software assistants to help doctors determine how the blood flow changes due to heart diseases without using a catheter. They help calculate how the blood pressure and shear forces on the wall of the blood vessels change for patients with heart valve problems. Additional patient-specific numerical flow simulations could help estimate the benefits provided by a new heart valve before an intervention.