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Cardiac catheterization is an invasive diagnostic technique used to identify and evaluate structural and functional diseases of the heart and major blood vessels. This technique diagnoses congenital heart disease, coronary artery disease, valvular heart disease, and coronary spasms and assesses ventricular function. It helps guide treatment decisions, including the need for revascularization procedures like percutaneous coronary intervention (PCI) or coronary artery bypass grafting (CABG) and...
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CT in transcatheter aortic valve replacement.

Philipp Blanke1, U Joseph Schoepf, Jonathon A Leipsic

  • 1From the Department of Radiol and Radiological Science and Division of Cardiology, Department of Medicine, Medical University of South Carolina, Ashley River Tower, MSC 226, 25 Courtenay Dr, Charleston, SC 29425 (P.B., U.J.S.); and Department of Radiol and Division of Cardiology, Department of Medicine, University of British Columbia, Vancouver, BC, Canada (J.A.L.).

Radiology
|November 23, 2013
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Summary

Computed tomographic (CT) angiography enhances transcatheter aortic valve replacement (TAVR) by improving patient selection, prosthesis sizing, and access planning. CT imaging aids in reducing complications and documenting procedural success for TAVR.

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Area of Science:

  • Cardiovascular Imaging
  • Interventional Cardiology
  • Medical Technology

Background:

  • Transcatheter aortic valve replacement (TAVR) is a crucial treatment for severe aortic stenosis in high-risk patients.
  • Noninvasive imaging is vital for TAVR patient selection, prosthesis sizing, and access strategies.
  • Over 90,000 TAVR procedures globally highlight its growing importance.

Purpose of the Study:

  • To describe the evolving role of computed tomographic (CT) angiography in transcatheter aortic valve replacement.
  • To highlight how CT imaging optimizes TAVR procedural outcomes.
  • To emphasize CT's utility in peri-interventional evaluation and postprocedural assessment.

Main Methods:

  • Utilizing computed tomographic (CT) angiography for three-dimensional assessment of the aortic root and iliofemoral access route.
  • Employing CT-based measurements in sizing algorithms to optimize prosthesis selection.
  • Leveraging CT for predicting optimal projection angles for valve deployment.
  • Using postprocedural CT imaging for success documentation and complication identification.

Main Results:

  • CT angiography provides comprehensive aortic annulus anatomy and geometry data, superior to 2D techniques.
  • Integration of CT measurements into sizing algorithms significantly reduces paravalvular regurgitation.
  • CT-based vascular access planning demonstrably lowers access-related complications.
  • Postprocedural CT effectively documents procedural success and identifies complications.

Conclusions:

  • Computed tomographic (CT) angiography is indispensable for optimizing transcatheter aortic valve replacement.
  • CT imaging improves patient selection, prosthesis sizing, and vascular access planning, leading to better outcomes.
  • The comprehensive information from CT enhances procedural safety and efficacy in TAVR.