Keywords:
Hypertension, Ablation procedures, MR-Functional imaging, Arteries / Aorta, Cardiac
Authors:
T. Hammer1, P. Hoffmann2, P. E. Goa1, F. Fadl Elmula2, K. H. Stensaeth2; 1Trondheim/NO, 2Oslo/NO
Methods and Materials
In ten patients the EnligHTN catheter system were used and in seven patients the Symplicity system.
TRH was defined as office systolic blood pressure (SBP) > 140 mmHg or ambulatory SBP > 135 mmHg despite maximally tolerated doses of ≥ 3 antihypertensive drugs including a diuretic.
An accurate CMR-protocol included aortic Pulse Wave Velocity (PWV) calculated by velocity mapping at two predefined aortic locations,
in addition to distensibility,
LV function,
and LV mass by fast gradient-echo imaging.
Fig. 1: EnligHTN ablation of right renal artery
Fig. 2: Measurement of flow in ascending aorta
Fig. 3: Measurement of flow in descending aorta
Fig. 4: Curves of flow in both ascending and descending aorta allows us to estimate the time delay in the aortic pulse wave. From oblique MR images we were able to measure the length of the aorta between measurements in the ascending and descending aorta.