Influence of recording scale on determination of left ventricular end‐diastolic pressure

Barry R. Hieb, Ronald J. Krone, Regis G. Lagler, G. Charles Oliver

Research output: Contribution to journalArticle


Left ventricular (LV) pressure waveforms for 20 beats, originally recorded at 200 scale (200 torr/10 cm) were rescaled by a computer system to represent the identical beats recorded at 40 scale (40 torr/10 cm). Both the original and the rescaled beats were independently evaluated by eight cardiologists who were unaware of the nature of the manipulated data. For each beat the average left ventricular end‐diastolic pressure (LVEDP) identified by the eight cardiologists was higher when analyzed on the 200 scale, with an average difference of 2.8 torr (P < 0.001). This scale‐dependence of pressure analysis has implications for the development of automated pressure analysis algorithms and for physician review of computer‐determined LVEDP data points.

Original languageEnglish
Pages (from-to)203-208
Number of pages6
JournalCatheterization and cardiovascular diagnosis
Issue number2
StatePublished - 1981
Externally publishedYes


  • blood pressure determination
  • digital computers
  • heart catheterization

Fingerprint Dive into the research topics of 'Influence of recording scale on determination of left ventricular end‐diastolic pressure'. Together they form a unique fingerprint.

  • Cite this