Validity of phonoarteriographic blood pressures during rest and exercise

Abstract

A modification of the auscultatory blood pressure method, the phonoarteriogram, was developed. The innovated method essentially is a modified amplifying stethoscope. The pressure in the cuff is recorded from a pressure transducer, and the systolic and diastolic criteria are recorded from a microphone. The phonoarteriogram gives the advantages of a permanent record, includes pulse rate and pulse sound data, is not affected by hearing acuity, permits determinations often denied using auscultation in high ambient noise and exercise conditions, and eliminates observer bias. Three hundred and forty resting determinations and 218 exercise determinations on 60 subjects indicated good agreement between the phonoarteriogram and auscultation. In 50 systolic and diastolic intra-arterial determinations before compression of the cuff, during rest and exercise from one subject, the phonoarteriogram was as valid as auscultation. In 56 intra-arterial determinations during deflation of the cuff, i.e., simultaneous with the indirect measurements, during rest and exercise from a second subject, the phonoarteriogram was less fallible than auscultation, particularly during exercise. Phonoarteriograms are valid, reliable, and objective blood pressure record blood pressure determination; auscultatory blood pressure; intra-arterial blood pressure; physical fitness testing; ausculation; effort or physical effort; exercise; exertion; fatigue; methods, physiological; instrumentation; pulse; work Submitted on January 16, 1964

Effects of propranolol and metoprolol on haemodynamic and respiratory indices and on perceived exertion during exercise in hypertensive patients.

“…The low frequency vibrations (16 to 33 Hz) of the sounds are used as signals and recorded on a circular graduated disc. Similar techniques have been proved to produce reliable blood pressure recordings during submaximal exercise (Mastropaolo et al, 1964;Sime et al, 1975; own observations). The recorded blood pressure was the mean of two measurements after 7 and 9 minutes of exercise.…”

Using Korotkoff Sounds to Detect the Degree of Vascular Compliance in Different Age Groups

“…By using a phonoarteriogram, one can detect the amplitude of the Korotkoff sounds produced [6]. The experiment is carried out in the laboratory by making use of the laboratory instruments (AD Instruments) and software (Lab Tutor).…”