Keywords:
Echocardiography, CT-Angiography, CT, Interventional vascular, Cardiovascular system, Cardiac, Comparative studies, Haemodynamics / Flow dynamics
Authors:
M. Kummann1, F. Plank2, G. J. Friedrich2, T. Bartel2, S. Mueller2, L. Kofler2, N. Bonaros3, W. Jaschke2, G. Feuchtner2; 1Innsbruck, [p/AT, 2Innsbruck/AT, 3Innsbuck/AT
DOI:
10.1594/ecr2013/C-0677
Results
Among the 44 patients 32 Patients were in Sinus rhythm,
the remaining 12 had atrial fibrillation.
Mean heart rate was 73 bpm (range 49-101).
Phase of best correlation
For the best correlation between CT and TTE (AVAbestcorr; r=0.94,
p=0.001),
the most frequently chosen phase was 35% of the RR-interval.
(11/44,
19%) as shown in Table1.
Phase of largest Aortic valve area
The largest AVA (AVAmax) was most likely to be found at 25% (17/44; 39%) of cardiac cycle in early to mid systole and far less often in late systole as shown in Table2.
The maximal AVA (AVA max) correlated significantly (r=0.64,
p<0.001); with an overestimation of + 0.12 (limits of agreement: -0.09-0.33) by CT.
Image quality
Image quality of the aortic valve was sufficient for diagnosis in all patients.
It was most frequently excellent or good at 25%,
30% and 35% of RR-interval.
There was a relationship between phases offering excellent image quality and heart rate.
For slow heart rates (<70bpm) image quality was most frequently excellent in early systole.
In patients with fast heart rates (>80) image quality was more often excellent in late diastole.
Peak prevalences of image quality graded as excellent was 15-25% for < 70 bpm,
20-30% for 70-80 bpm and 25—40% for >80 bpm.
Bicuspid valves
Functional bicuspid valves were found in 9/44 (20%).
(5NC/RC,
3LC/RC,
1 NC/LC).
Two congenital bicuspid valves (both RC/LC,
with calcified Raphe) were diagnosed.