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Interval Level of Measurement

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Related Experiment Video

Updated: May 14, 2026

A Functional Whole Blood Assay to Measure Viability of Mycobacteria, using Reporter-Gene Tagged BCG or M.Tb (BCG lux/M.Tb lux)

A Functional Whole Blood Assay to Measure Viability of Mycobacteria, using Reporter-Gene Tagged BCG or M.Tb (BCG lux/M.Tb lux)

Published on: September 14, 2011

On time interval measurements using BCG.

R Casanella¹, J Gomez-Clapers, R Pallas-Areny

¹Instrumentation, Sensors and Interfaces Group, Department of Electronic Engineering, EETAC, BarcelonaTech, Universitat Politècnica de Catalunya UPC, 08860 Castelldefels, Barcelona, Spain. ramon.casanella@upc.edu

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|February 1, 2013

Summary

This summary is machine-generated.

This study explores the RJ interval, a novel cardiovascular measure derived from electrocardiogram (ECG) and ballistocardiogram (BCG) signals. Findings reveal its potential for assessing cardiovascular performance during dynamic physiological changes.

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Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements

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Published on: June 25, 2021

Area of Science:

Biomedical Engineering
Cardiovascular Physiology
Signal Processing

Background:

Traditional noninvasive cardiovascular assessment relies on time intervals from ECG, PPG, and IPG signals.
The ballistocardiogram (BCG) is an emerging physiological signal for cardiovascular monitoring.
Understanding novel time intervals like the RJ interval is crucial for advancing noninvasive cardiovascular assessment.

Purpose of the Study:

To investigate the behavior of the RJ interval under induced hemodynamic changes.
To evaluate the utility of the RJ interval for assessing cardiovascular performance.
To deepen the understanding of BCG-based cardiovascular time intervals.

Main Methods:

Measurement of the RJ interval, defined as the time between ECG R wave and BCG J wave.
Induction of rapid blood pressure variations using paced respiration.
Continuous monitoring of beat-to-beat blood pressure (systolic and diastolic) waveforms.

Main Results:

The RJ interval exhibits characteristic changes in response to induced blood pressure fluctuations.
Analysis demonstrates a correlation between RJ interval dynamics and cardiovascular performance variations.
The study provides initial data on the responsiveness of the RJ interval to physiological challenges.

Conclusions:

The RJ interval shows promise as a novel, noninvasive indicator of cardiovascular function.
Further research into BCG-derived intervals can enhance cardiovascular monitoring capabilities.
The RJ interval's behavior under dynamic conditions warrants continued investigation for clinical applications.