Noninvasive Cardiovascular Diagnosis of Patients With Fully Magnetically Levitated Blood Pumps

Inclusion Criteria: All patients with the HeartMate 3 system implanted at the Medical University of Vienna, which are able and willing to understand and sign the informed consent form, and which do not meet any exclusion criteria will be included. Exclusion Criteria: * Age: \<18 or \>75 years * Inability to provide informed consent * Patients with known intraventricular or aortic root thrombus formation or known pathology of the coagulatory system. Although an intraventricular thrombus formation is usually removed intraoperatively during the LVAD implantation procedure, the rationale for this exclusion criterion is to avoid suction of such thrombus material during possible speed changes (± 20% from the initial pump speed). Consequently, the exclusion of patients with known pathology of the coagulation system, who thus have a higher risk of developing any kind of thrombus formation, is another safety measure. * Inaccessibility for transthoracic ultrasound diagnostics. Firstly, as described in the visit and assessment schedule (Appendix), changes in pump speed are only performed under transthoracic echo guidance. Secondly, as described above, echo parameters are required to correlate with the non-invasive CDAS pump data. Therefore, the inaccessibility of ultrasound diagnostics (e.g. due to poor image quality) is another exclusion criterion.