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Related Experiment Videos

Left ventricular intramyocardial pressure determination using two different solid-state micromanometric pressure

J G Kingma1, J A Armour, J R Rouleau

  • 1Québec Heart Institute, Laval Hospital, Ste-Foy, Canada.

Canadian Journal of Physiology and Pharmacology
|June 1, 1996
PubMed
Summary

Intramyocardial pressure measurements vary based on sensor orientation and transducer type. Proper configuration is crucial for accurate assessment of ventricular blood flow dynamics.

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Area of Science:

  • Cardiovascular Physiology
  • Biomedical Engineering

Background:

  • Intramyocardial tissue pressure impacts ventricular blood flow and cardiac dynamics.
  • Accurate measurement of intramyocardial pressure is essential for understanding cardiac function.

Purpose of the Study:

  • To compare intramyocardial pressure measurements using two different micromanometers.
  • To investigate the influence of sensor orientation on pressure readings.

Main Methods:

  • Simultaneous measurement of left ventricular subepicardial and subendocardial pressures using Millar and Konigsberg transducers.
  • Comparison of transducer readings with left ventricular cavity pressure.

Main Results:

  • Systolic pressures were similar between transducers in endocardial and epicardial positions facing the cavity.

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  • Epicardial diastolic pressures exceeded left ventricular cavity pressure.
  • Out-of-phase signals were observed when sensors faced epicardially, indicating variability.

    • Conclusions:

    • Intramyocardial pressure signal output is sensitive to sensor orientation, cable flexibility, and transducer type.
    • Accurate intramyocardial pressure assessment requires careful consideration of measurement configuration.