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Related Experiment Video

Updated: Jun 15, 2026

Four-Dimensional Computed Tomography-Guided Valve Sizing for Transcatheter Pulmonary Valve Replacement
09:57

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

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Simple area-based measurement for multidetector computed tomography to predict left ventricular size.

Christopher L Schlett1, Dylan C Kwait, Amir A Mahabadi

  • 1Cardiac MR PET CT Program, Massachusetts General Hospital, and Harvard Medical School, Boston, MA 02114, USA.

European Radiology
|March 6, 2010
PubMed
Summary

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Imaging Studies for Cardiovascular System V: CT01:28

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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An axial area-based method using computed tomography (CT) accurately estimates left ventricular (LV) mass and volume. This reproducible 2D LV area measurement is superior to the cardiothoracic ratio (CTR) for predicting LV size.

Area of Science:

  • Cardiovascular imaging
  • Radiology
  • Cardiac assessment

Background:

  • Left ventricular (LV) mass and dimensions are crucial predictors of patient morbidity and mortality.
  • Accurate assessment of LV geometry is vital for clinical decision-making.

Purpose of the Study:

  • To evaluate the accuracy of an axial area-based method using computed tomography (CT) for estimating LV mass and volume.
  • To compare the efficacy of this novel method with traditional measurements like the cardiothoracic ratio (CTR).

Main Methods:

  • Contrast-enhanced 64-slice CT scans were performed on 45 subjects with diverse LV geometry.
  • Three-dimensional (3D) data were used to derive LV mass and volume.
  • Two-dimensional (2D) images were analyzed for LV area, direct transverse cardiac diameter (dTCD), and CTR. Feasibility was confirmed in 100 additional subjects.

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Last Updated: Jun 15, 2026

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

  • Excellent inter- and intra-observer agreement was achieved for 2D LV area measurements (ICC = 0.99).
  • The 2D LV area showed high correlation with LV volume (r=0.68), mass (r=0.73), and size (r=0.82) (p < 0.0001).
  • Cardiothoracic ratio (CTR) did not correlate with LV volume, mass, or size (p > 0.27).

Conclusions:

  • An axial LV area-based measurement provides a simple, highly reproducible, and accurate method for assessing LV size.
  • This CT-based approach offers a more reliable alternative to the traditional CTR for predicting LV mass and volume.