Electrocardiography · ECG
Records cardiac electrical activity at 1,000 Hz. Used by researchers to identify R-peaks and compute heart rate and heart rate variability metrics.
Wearable Research System
See how the body responds, in the lab and beyond.
VU-AMS Core is a wearable ECG and impedance cardiography monitor for researchers studying autonomic reactivity, stress, and emotion. It captures synchronized cardiac and movement signals while participants move through daily life.
For non-invasive scientific research use. Not intended for medical diagnosis.
Digital Biomarkers & Signals
A connected view of cardiovascular activity and movement.
Core stores raw, high-resolution waveforms so research teams can inspect recording quality, score autonomic beats, and derive custom measures for their study protocols.
1,000 Hz
Impedance Cardiography · ICG
Measures dynamic thoracic impedance changes at 1,000 Hz. Combined with ECG, it yields systolic time intervals including pre-ejection period (PEP).
Motion & Orientation
Triaxial accelerometer and gyroscope record movement dynamics, while a magnetometer captures spatial orientation context.
All research parameters are derived from raw recordings using validated scoring algorithms in CoreLab.
Study Protocol
From participant setup to analysis-ready recordings.
Prepare & apply
Prepare skin sites and attach the color-coded electrode leads. The Core manual details validated electrode placement for ambulatory reliability.
Configure on iPad
CoreControl enters participant metadata, validates live ECG and ICG signal quality wirelessly, and starts acquisition.
Mark study events
Send timestamped markers from CoreControl as tasks or stress conditions change, perfectly aligning signals with study events.
Review & analyze
CoreLab imports recordings directly from the microSD card for waveform inspection, artifact correction, scoring, and batch export.
Derived Parameters
Translate raw biosignals into autonomic insights.
CoreLab derives autonomic metrics from ECG and ICG across study intervals, conditions, or 24-hour ambulatory recordings. Respiratory sinus arrhythmia (RSA) indexes parasympathetic tone, while pre-ejection period (PEP) provides a validated index of sympathetic activity.
Explore CoreLab and file specificationsHeart rate & HRVSDNN, RMSSD, pNN50, and frequency-domain spectral power
Cardiac timingPre-ejection period (PEP) and left ventricular ejection time (LVET)
Respiration & hemodynamicsRespiratory rate, relative tidal volume, stroke volume and cardiac output
Movement contextPosture classification and physical activity intensity
Ecosystem & Resources
Hardware, acquisition app, and analysis software in harmony.
01CoreLab Desktop SuiteWindows, macOS, and Linux analysis suite for waveform inspection, scoring, and export.02CoreControl for iPadOS & iOSProtocol management, live signal verification, and synchronized event marking.03VU-AMS Core Manual · Version 3.11Complete guide to electrode application, calibration, session workflows, and troubleshooting.
Note on file formats: VU-AMS Core records 7fs raw data and processed
.amsdatai files. Use CoreLab for these files; the older VU-DAMS 5fs software is maintained for legacy 5fs studies.