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Sixty-four slice CT evaluation of aortic stenosis using planimetry of the aortic valve area

Gudrun M Feuchtner1, Silvana Müller, Johannes Bonatti

  • 1Clinical Department of Radiology II, Innsbruck Medical University, Anichstrasse 35, A-6020 Innsbruck, Austria. gudrun.feuchtner@i-med.ac.at

AJR. American Journal of Roentgenology
|June 21, 2007
PubMed

Insights

Sixty-four slice computed tomography (CT) provides accurate aortic valve area planimetry for patients with aortic stenosis, correlating well with transthoracic echocardiography (TTE) and transesophageal echocardiography (TEE). This method aids in identifying and evaluating concomitant aortic stenosis during CT coronary angiography.

Area of Science:

  • Cardiovascular imaging
  • Medical diagnostics
  • Radiology

Background:

  • Aortic stenosis is a significant valvular heart disease.
  • Accurate measurement of the aortic valve area is crucial for assessing stenosis severity.
  • Current methods like echocardiography have limitations.

Purpose of the Study:

  • To evaluate the accuracy of 64-slice CT for aortic valve area planimetry.
  • To compare CT-derived measurements with transthoracic echocardiography (TTE) and transesophageal echocardiography (TEE).
  • To assess the utility of CT in evaluating aortic stenosis.

Main Methods:

  • 36 patients with aortic valve disease undergoing 64-slice CT coronary angiography were studied.
  • Aortic valve area was measured using CT planimetry.
  • CT measurements were compared with TTE (Doppler continuity equation) and TEE (planimetry).

Main Results:

  • CT planimetry showed good correlation with TTE (r=0.88) and excellent correlation with TEE (r=0.99).
  • Mean heart rate was maintained at 62.5 bpm without beta-blockers.
  • CT-derived aortic valve area correlated significantly with transvalvular pressure gradients.

Conclusions:

  • 64-slice CT enables accurate planimetry of the aortic valve area in patients with aortic stenosis.
  • CT can effectively identify and evaluate concomitant aortic stenosis in patients undergoing coronary angiography.
  • MDCT is a valuable tool for assessing aortic valve stenosis.
Abstract

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