Role of Computed Tomography before Transcatheter Pulmonary Valve Implantation in Patients with Dysfunctional Native Right Ventricular Outflow Tract

Figure 1. Cardiac computed tomography before transcatheter pulmonary valve implantation. MPR reconstruction. The green outline indicates the pyramidal shape of the right ventricular outflow tract. S—superior, I—inferior.

Figure 2. Cardiac computed tomography before transcatheter pulmonary valve implantation. MPR reconstruction. The green lines indicate 6 consecutive dimensions levels: A—level of the right ventricular outflow tract; B—level under the pulmonary valve; C—level of the pulmonary valve; D—level above the pulmonary valve; E—level of the middle part of the main pulmonary artery; F—level before the bifurcation main pulmonary artery.

Figure 3. Cardiac computed tomography before transcatheter pulmonary valve implantation. MPR reconstruction. End-diastolic phase. The cross-sections shown in each Panel are taken where the green lines are in Figure 2, respectively. (A) Level of the right ventricular outflow tract. (B) Level under the pulmonary valve. The green lines indicate the longitudinal and transverse dimensions of the cross-section, and the red line indicates the cross-section outline. Cardiac computed tomography before transcatheter pulmonary valve implantation. MPR reconstruction. End-diastolic phase. The cross-sections shown in each Panel are taken where the green lines are in Figure 2, respectively. (C) Level of the pulmonary valve. (D) Level above the pulmonary valve. (E) Level of the middle part of the main pulmonary artery. (F) Level before the bifurcation main pulmonary artery. The green lines indicate the longitudinal and transverse dimensions of the cross-section, and the red line indicates the cross-section outline.

Figure 4. Cardiac computed tomography before transcatheter pulmonary valve implantation. MPR reconstruction Level above the pulmonary valve. (A) End-diastolic phase. (B) End-systolic phase. The green lines indicate the longitudinal and transverse dimensions of the cross-section, and the red line indicates the cross-section outline.

Figure 5. Cardiac computed tomography before transcatheter pulmonary valve implantation. MPR reconstruction. (A) Measurement of the distance between the level of the right ventricular outflow tract and the level before the bifurcation main pulmonary artery. (B) Measurement of the distance between the level under the pulmonary valve and the level above the pulmonary valve. (C) Measurement of the distance between the level under the pulmonary valve and the level before the bifurcation main pulmonary artery. The green lines indicate 6 consecutive dimensions levels, and red lines indicate measured distances.

Figure 6. Cardiac computed tomography before transcatheter pulmonary valve implantation. MPR reconstruction. Red lines indicate the measured distances of the right ventricular outflow tract from the proximal segment of the right coronary artery.