In 1918, Bordet and Vaquez1 described two methods for measuring enlargement of the left ventricle in the anteroposterior plane or depth. Measurements on the orthodiagraphic tracing or teleoroentgenogram of the heart have been developed to the point where they are essential to careful cardiac study. But they give information concerning only the measurements of the heart in the transverse plane. It can be appreciated how valuable would be additional information concerning enlargement of the left ventricle in the anteroposterior plane. In view of this fact, and because these methods are gaining attention and prominence in the roentgen-ray laboratories abroad, a critical study of the value of these methods was made in a series of seventy subjects and nine anatomic cross sections.
Imagine the patient standing, facing the fluoroscopic screen, as the cross section Figure 1 represents, with the target situated 60 cm. from the screen. The diaphragm is shut
Thank you for submitting a comment on this article. It will be reviewed by JAMA Internal Medicine editors. You will be notified when your comment has been published. Comments should not exceed 500 words of text and 10 references.
Do not submit personal medical questions or information that could identify a specific patient, questions about a particular case, or general inquiries to an author. Only content that has not been published, posted, or submitted elsewhere should be submitted. By submitting this Comment, you and any coauthors transfer copyright to the journal if your Comment is posted.
* = Required Field
Disclosure of Any Conflicts of Interest*
Indicate all relevant conflicts of interest of each author below, including all relevant financial interests, activities, and relationships within the past 3 years including, but not limited to, employment, affiliation, grants or funding, consultancies, honoraria or payment, speakers’ bureaus, stock ownership or options, expert testimony, royalties, donation of medical equipment, or patents planned, pending, or issued. If all authors have none, check "No potential conflicts or relevant financial interests" in the box below. Please also indicate any funding received in support of this work. The information will be posted with your response.
Some tools below are only available to our subscribers or users with an online account.
Download citation file:
Web of Science® Times Cited: 1
Customize your page view by dragging & repositioning the boxes below.
More Listings atJAMACareerCenter.com >
Enter your username and email address. We'll send you a link to reset your password.
Enter your username and email address. We'll send instructions on how to reset your password to the email address we have on record.
Athens and Shibboleth are access management services that provide single sign-on to protected resources. They replace the multiple user names and passwords necessary to access subscription-based content with a single user name and password that can be entered once per session. It operates independently of a user's location or IP address. If your institution uses Athens or Shibboleth authentication, please contact your site administrator to receive your user name and password.