Keywords:
Congenital, Diagnostic procedure, CT, Cardiac
Authors:
M. Tezza1, M. Witsenburg2, K. Nieman2, P. van de Woestijne2, R. P. J. Budde2; 1Verona/IT, 2Rotterdam/NL
Results
Thirty patients were included.
All patients successfully underwent the procedure and none of them experienced coronary compression.
The minimal distance between the RCA,
LM,
LAD and LCx to the stenotic part of the pulmonary tract was 13.5±7.8 mm (range from 3,5 to 41 mm),
16.2±9.6 mm (range from 4 to 38,5 mm),
14.2±8.6 mm (range from 3 to 32 mm) and 23.7±11.2 mm (range from 9 to 47 mm),
respectively.
All coronaries were at least at 3 mm distance from the pulmonary tract.
The pulmonary trunk diameters increase in systole and the difference between the two cardiac phases was statistically significant.
Since the pulmonary artery tends to expand in systole,
the distance of the coronary artery to the target point tends to decrease in this phase (Fig.
3).
Even though in our experience none of the patients showed compression risk in one phase and no risk in the other and all of them safely underwent the implantation,
the distance between RCA and LAD undergoes significant changes during cardiac cycle.
The mean absolute difference between systole and diastole for the 13 patients with both phases available was 0.9±0.8 mm,
1.4±0.9 mm,
1.1±0.8 mm and 2.5±2.3 mm,
for the RCA,
LM,
LAD and LCx respectively (Table).
CA-PT relationship
|
Distance in ED (mm)
|
Distance in ES (mm)
|
p value
|
Absolute difference between ED and ES (mm)
|
RCA
|
11.9±6
|
11±5,7
|
0.006
|
0.9±0.8
|
LM
|
17,6±11.5
|
17±12
|
0.199
|
1.4±0.9
|
LAD
|
15.2±7.5
|
14.3±7.8
|
0.013
|
1.1±0.8
|
LCX
|
25.4±12.1
|
24.8±11.2
|
0.352
|
2.5±2.3
|