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Gated CTA TAVR

Last Updated: 2026-01-01 Author:

  • 1. Clinical Summary

    Series Phase Coverage
    Gated CTA Chest Arterial (bolus tracked) Thoracic inlet to Diaphragm
    Flash CTA AP Contrast (Immediate delay) Diaphragm to Femoral heads
    • Pre-TAVR planning
    • Aortic stenosis valve replacement planning

  • 2. Patient Prep

    • Position: Supine with arms raised
    • NPO Status: NPO 4 hours
    • Pre-Medication:
      • HR < 65 target. Premedication not required.

  • 3. IV Contrast & Injection

    Parameter Value
    Agent Isovue 370
    Volume 1.6 mL/kg
    Flow Rate 4 mL/s
    Duration 22s
    Timing Method Bolus Tracking
    ROI Placement Ascending aorta
    Trigger (HU) 180 HU

    Use full dose if GFR > 30

    If GFR < 30

    Max Contrast = \(2*\left[\frac{\text{Patient Weight}}{75 \text{ kg}} * \text{eGFR}\right]\)

  • 4. Special Notes

    • Gated CHEST retrospective + Flash AP. Gated for valve measurements. AP for access planning. TAVR post-processing required
    • Additional Recons: TAVR measurements: annulus area perimeter diameters. Coronary heights. Sinus of Valsalva. STJ. Ascending aorta. Access vessels
    • 20G IV antecubital

    Safety First

    • Renal Function: Verify eGFR > 30
    • Allergy: Check allergy history
    • Measure aortic annulus (3 diameters). Coronary heights. Access vessels (iliofemoral). Valve calcium. Comprehensive TAVR measurements
    • TAVR-specific measurements protocol. Thin slices critical
Series Name Start Location End Location Delay Slice Thickness Notes
Scout Thoracic inlet Femoral heads N/A N/A AP lateral full
Gated CTA Chest Thoracic inlet Diaphragm Bolus tracked 0.5 mm Retrospective gating for valve
Flash CTA AP Diaphragm Femoral heads Immediate 0.625 mm Iliofemoral access planning
Plane Acquisition FOV Thickness/Increment Kernel IR Strength Notes
Axial Gated chest Heart 0.5 mm/0.5 mm Cardiac 3 Aortic valve and root measurements
Axial Flash AP AP 2 mm/2 mm Vascular 3 Access vessel assessment
Double oblique Gated chest Aortic valve 0.5 mm Cardiac 3 En face aortic annulus for sizing
3D VR Flash AP Iliofemoral 1.5 mm source Vascular 3 3D access planning