An official website of the United States government
Here's how you know
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
As a library, NLM provides access to scientific literature. Inclusion in an NLM database does not imply endorsement of, or agreement with,
the contents by NLM or the National Institutes of Health.
Learn more:
PMC Disclaimer
|
PMC Copyright Notice
1Medical Clinic of the Peter Bent Brigham Hospital and the Department of Medicine of the Harvard Medical School, Boston, Massachusetts
†
I wish to express my great indebtedness to Dr. W. Proctor Harvey, Assistant in Medicine, Peter Bent Brigham Hospital, Boston, for his help in obtaining numerous phonocardiograms and in other ways.
*
The St. Cyres Lecture of the National Heart Hospital, London, July 8, 1948.