Variability in Blood Pressure Measurements from Recorded Auscultation Sounds

Alan Murray, Dingchang Zheng, Chengyu Liu, David Graham, Jeff Neasham, Adrian Cossor, Clive Griffiths

Research output: Chapter in Book/Report/Conference proceedingConference proceedingpeer-review


Blood pressure measurement is clinically important. The manual auscultation method is retained as the current "gold standard". This study was designed to evaluate the variability of repeat measurements by the same operator, and between operators, when evaluating the same data.Ten young volunteer subjects with no known cardiovascular disease were studied. Korotkoff sounds were recorded from a standard stethoscope head connected to an acoustic microphone, and the audio sounds recorded during blood pressure measurements with cuff deflation, while subjects sat quietly on a chair. All recordings were replayed blindly and independently, to two trained operators. The operators identified systolic and diastolic blood pressure (SBP and DBP) without knowledge of the subject. After all recordings had been analysed once, the analysis was repeated.SBP rangedfrom 95 to 112 mmHg, and DBP from 58 to 78 mmHg. The difference in repeat listening measurements for each observer was -0.8 ±3.3 and -0.5 ±2.1 mmHg for SBP, and -0.4 ±2.3 and 0.4 ± 1.7 mmHg for DBP. The difference between the two operators for each measurement was 0.7 ± 1.6 and 0.9 ± 3.6 mmHg for SBP, and -1.7 ± 2.3 and -1.0 ± 2.0 mmHg for DBP. We have shown similar variability between operators as between repeat measurements on identical recordings.

Original languageEnglish
Title of host publication2019 Computing in Cardiology, CinC 2019
PublisherIEEE Computer Society
Number of pages4
ISBN (Electronic)9781728169361
Publication statusPublished - 1 Sep 2019
Externally publishedYes
Event2019 Computing in Cardiology - Singapore, Singapore
Duration: 8 Sep 201911 Sep 2019

Publication series

NameComputing in Cardiology
ISSN (Print)2325-8861
ISSN (Electronic)2325-887X


Conference2019 Computing in Cardiology
Abbreviated titleCinC 2019
Internet address

Bibliographical note

Since volume 33 (2006), CinC has been an open-access publication, in which copyright in each article is held by its authors, who grant permission to copy and redistribute their work with attribution, under the terms of the Creative Commons Attribution License.

ASJC Scopus subject areas

  • Computer Science(all)
  • Cardiology and Cardiovascular Medicine


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