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Related Experiment Video

Updated: Jun 19, 2026

Simultaneous Electrocardiography Recording and Invasive Blood Pressure Measurement in Rats
07:35

Simultaneous Electrocardiography Recording and Invasive Blood Pressure Measurement in Rats

Published on: January 31, 2019

ARTERIAL HYPERTENSION IN RATS : I. METHODS.

H A Schroeder1

  • 1Hospital of The Rockefeller Institute for Medical Research.

The Journal of Experimental Medicine
|October 30, 2009
PubMed
Summary

This study establishes normal blood pressure standards for rats under anesthesia. Cardiac hypertrophy and elevated blood pressure indicate hypertension, with heart weight being a more reliable indicator than blood pressure measurements alone.

Area of Science:

  • Physiology
  • Cardiovascular Research
  • Animal Models

Background:

  • Establishing normal physiological parameters is crucial for accurate disease modeling.
  • Hypertension research often utilizes animal models to understand disease mechanisms and test interventions.

Purpose of the Study:

  • To ascertain normal blood pressure standards in rats under pentobarbital sodium anesthesia.
  • To investigate methods for inducing hypertension in rats and identify reliable indicators of the hypertensive state.

Main Methods:

  • Measurement of blood pressure in rats under pentobarbital sodium anesthesia.
  • Induction of hypertension through various methods including hormonal injections (estradiol, pitressin, dihydroxyphenylalanine, adrenalin in oil) and surgical interventions (renal artery constriction, hydronephrosis, kidney injury, perinephritis).

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Last Updated: Jun 19, 2026

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  • Assessment of cardiac hypertrophy and heart weight as indicators of hypertension.

    • Main Results:

    • Estradiol, pitressin, and dihydroxyphenylalanine did not consistently induce sustained arterial hypertension.
    • Adrenalin in oil injections, renal artery constriction, hydronephrosis, kidney injury, and perinephritis led to cardiac hypertrophy and/or elevated blood pressure.
    • Heart weight was identified as a more reliable index of the hypertensive state in rats compared to isolated blood pressure measurements under anesthesia, which are highly variable.

    Conclusions:

    • Rats are highly susceptible to the induction of the hypertensive state through various experimental manipulations.
    • Cardiac hypertrophy and increased heart weight are reliable indicators of experimental hypertension in rats.
    • Heart weight serves as a more robust biomarker for hypertension in rats than transient blood pressure readings under anesthesia.