The following table or figure may be downloaded to PowerPoint for personal use in teaching and presentations. This feature is available to all subscribers to the journal.

You MUST read and follow the guidelines at Request to Reproduce AJR Content if you are distributing or using AJR content beyond academic use (limited distribution, non-revenue producing, or educational purposes).

(Downloading may take up to 30 seconds.
If the slide opens in your browser, select File -> Save As to save it.)
Click on image to view larger version.

Fig. 4. —47-year-old man with pulsus alternans caused by idiopathic dilated cardiomyopathy. Doppler sonogram shows peak systolic velocities in external carotid artery that oscillate between two levels on sequential beats (arrows). Note that cardiac rhythm remains regular throughout.