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Imaging Studies for Cardiovascular System V: CT

Imaging Studies for Cardiovascular System V: CT

Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...

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Related Experiment Video

Updated: May 10, 2026

Standardized Technique of Aortic Valve Re-implantation for Valve-sparing Aortic Root Replacement

Standardized Technique of Aortic Valve Re-implantation for Valve-sparing Aortic Root Replacement

Published on: December 11, 2017

Preprocedural Computed Tomography Planning for Surgical Aortic Valve Replacement.

Atsushi Okada¹, Erik Beckmann², Erick E Rocher¹

¹Valve Science Center, Minneapolis Heart Institute Foundation, Minneapolis, Minnesota.

The Annals of Thoracic Surgery

|February 21, 2024

Summary

Computed tomography (CT) sizing for surgical aortic valve replacement (SAVR) improves valve selection and reduces prosthesis-patient mismatch compared to traditional methods. This approach minimizes interoperator variability, enhancing patient outcomes.

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Four-Dimensional Computed Tomography-Guided Valve Sizing for Transcatheter Pulmonary Valve Replacement

Four-Dimensional Computed Tomography-Guided Valve Sizing for Transcatheter Pulmonary Valve Replacement

Published on: January 20, 2022

Area of Science:

Cardiovascular Surgery
Radiology
Medical Imaging

Background:

Transcatheter valve sizing relies on preprocedural computed tomography (CT), but surgical aortic valve replacement (SAVR) uses intraoperative sizers, leading to variability and potential prosthesis-patient mismatch.
This study investigates the utility of CT annulus measurements for guiding SAVR valve selection.

Purpose of the Study:

To evaluate the effectiveness of CT-derived annulus measurements in improving SAVR valve sizing.
To compare prosthesis-patient mismatch rates between CT-guided and conventional SAVR sizing methods.

Main Methods:

Patients undergoing SAVR with specific valve types and preoperative CT imaging were included.
A CT sizing algorithm was applied to guide minimum SAVR label size, with final valve choice by the surgeon.
Outcomes were compared between a CT sizing cohort (n=102) and a conventional sizing cohort (n=180).

Main Results:

CT sizing significantly reduced the incidence of implanted valves being smaller than CT-predicted size (12% vs. 31%) and severe prosthesis-patient mismatch (0% vs. 6%).
Interoperator variability associated with incorrect valve sizing was eliminated with CT sizing.
P-values: P = .001 for valve size discrepancy, P = .039 for mismatch.

Conclusions:

CT sizing enhances valve selection accuracy in SAVR, leading to reduced prosthesis-patient mismatch and interoperator variability.
Preoperative CT sizing can predict prosthesis-patient mismatch and identify candidates requiring aortic root enlargement.