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Related Experiment Videos

Tracheal carinal angle and left atrial size.

V Taskin1, M C Bates, S A Chillag

  • 1Department of Medicine, West Virginia University Health Sciences Center, Charleston Division 25304.

Archives of Internal Medicine
|February 1, 1991
PubMed
Summary

A widened tracheal carinal angle on chest X-rays can reliably predict left atrial enlargement. This finding suggests elevated left ventricular pressure, offering a simple diagnostic method.

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Area of Science:

  • Cardiology
  • Radiology
  • Medical Imaging

Background:

  • Left atrial enlargement is a critical indicator of elevated left ventricular end-diastolic pressure.
  • An increased tracheal carinal angle on chest radiography has been associated with left atrial enlargement.

Purpose of the Study:

  • To retrospectively compare echocardiographically determined left atrial size with the carinal angle measured on plain chest films.
  • To establish the reliability of the carinal angle as a predictor of left atrial enlargement.

Main Methods:

  • Echocardiography was used to select patients with enlarged left atria and age-matched controls with normal left atrial size.
  • The carinal angle was measured on standard and portable chest roentgenograms using a goniometer.

Main Results:

  • A carinal angle of 100 degrees or greater accurately predicted left atrial enlargement (left atrium diameter > 5.0 cm).
  • The study demonstrated a strong correlation between increased carinal angle and left atrial size.

Conclusions:

  • A carinal angle exceeding 100 degrees is a simple, cost-effective, and dependable method for predicting left atrial enlargement.
  • This radiographic finding can aid in the early identification of potential cardiac issues related to left atrial size.

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