Worldwide, five percent of all people over the age of 65 suffer from atrial fibrillation. While cardiac arrhythmia can be treated with medication, patients have to take it for the rest of their lives. Ablation therapy offers an alternative: myocardial cells in the left atrium are obliterated to interrupt the problematic pathway. However, every patient is different. For this reason, electro physiologists have to be able to discern the size and shape of the left ventricle in precise detail during the intervention. Syngo DynaCT Cardiac provides the necessary support: the software from Siemens Medical Solutions provides three-dimensional displays of the ventricle. The physician is able to view the 3-D object from all sides - even during an intervention. During the examination, with the press of a button syngo DynaCT Cardiac delivers CT-like slice images of an organ in motion using an angiographic C-arm system. During the intervention, the physician simply moves the C-arm in a semicircle around the patient and -optionally ECG-triggered - acquires a defined number of projections. As with a CT scanner, these projections are then reconstructed into slice images and a 3D representation, which are sent to the monitor at the angiography system.