An attempt has been made to show that the data available are not altogether adequate for establishing exact criteria for the normal electrocardiogram. Some of the more recent efforts to correct this situation have been reviewed and synthesized so far as possible into a form which it is hoped may be immediately useful. It is emphasized that this report is merely of recent clinical progress in the field. A more comprehensive and statistically complete investigation of the normal electrocardiogram in all age groups remains to be done.
- © 1953 American Heart Association, Inc.