Abstract
External recordings of the carotid pulse have been compared in six patients with simultaneous recordings of the carotid pressure pulse: in the absence of hypertension, the external recordings satisfactorily reproduced the systolic part of the pressure pulse. External carotid recordings from 43 patients showed varying differences from the aortic pulse, but usually retained the same general form and were seldom inferior as a diagnostic guide. In the brachial pulse of 25 patients, however, many of the features of the central pulse were lost or greatly changed, so that the brachial pulse was of much less value in diagnosis than the external carotid.