Keywords:
Kidney, Arteries / Aorta, Interventional vascular, CT-Angiography, Ablation procedures, Hypertension
Authors:
J. Petersen1, P. Nasseri2, E. Schönherr1, C. Koppelstaetter1, B. Glodny1; 1Innsbruck/AT, 2Innsrbuck/AT
DOI:
10.1594/ecr2013/C-1337
Results
The main renal artery of 19 patients (18.6%) was not longer than 2 cm and in 23 patients (22.5%) the diameter of renal artery was below 4 mm.
Two patients with fibromuscular dysplasia and an atherosclerotic renal artery stenosis was found in one patient.
Excluding multiple renal arteries 36.2% of patients were unsuitable for RFA,
and including multiple renal arteries 51% of all patients.
Due to their small diameter right main renal arteries are less amenable to the therapy than left ones.
A predictive factor for adequate vessel diameter of renal artery is young age and male sex.
Figure 2 and 3 show the percentage of first and second renal arteries of both sides not being separated in segmental kidney arteries at different vessel length with a inner lumen >4mm.
Table 1 shows number of patients and relative number with different theoretical contraindications for renal artery ablation.
|
right
|
left
|
Right & left
|
Excluded patients (%)
|
Multiple renal arteries
|
13
|
12
|
1
|
24 (23,5%)
|
Main artery not longer than 2 cm
|
6
|
15
|
2
|
19 (18,6%)
|
Inner lumen of artery 2 cm distal renal ostium < 4mm
|
16
|
11
|
4
|
23 (22,5%)
|
Combination of criterium length and inner lumen
|
20
|
26
|
34
|
12 (11,7%)
|
Fibromuscular dysplasia
|
2
|
1
|
1
|
2 (2%)
|
Renal artery stenosis
|
1
|
0
|
0
|
1 (1%)
|