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Gated CTA TAVR

Last Updated: 2026-01-01 Author: None

  • 1. Clinical Summary

    Series Phase Coverage
    Non-contrast CAP Non-contrast Thoracic Inlet → Femoral heads
    Gated CTA Chest Bolus tracked Thoracic inlet → Diaphragm
    Flash CTA AP Immediate Diaphragm → 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
    • 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
Non-contrast CAP Thoracic Inlet Femoral heads Non-contrast 1 mm
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 Non-contrast CAP Thoracic Inlet 1 mm/1 mm Standard 3
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