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Updated: Jun 18, 2026
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Fetal Mouse Cardiovascular Imaging Using a High-frequency Ultrasound (30/45MHZ) System
Published on: May 5, 2018
Doppler-derived trigger signals for high-frame-rate mouse cardiovascular imaging.
Orlando Aristizabal1, Jonathan Mamou, Daniel H Turnbull
1Skirball Institute of Biomolecular Medicine, New York University School of Medicine, New York, NY, USA.
Summary
Researchers developed a new method using Doppler ultrasound to create a cardiac-trigger signal for imaging embryonic mouse hearts. This technique overcomes the impracticality of electrocardiograms in embryos, enabling crucial studies of congenital heart disease.
Area of Science:
- Cardiovascular Science
- Developmental Biology
- Medical Imaging
Background:
- High-frame-rate cardiac imaging in adult mice relies on electrocardiogram (ECG) R-wave triggering.
- Cardiovascular development is critical for embryonic viability, and studying congenital heart disease in embryonic models is essential.
- Obtaining ECG signals from developing mouse embryos is technically challenging.
Purpose of the Study:
- To develop and validate a novel method for generating a cardiac-trigger signal from Doppler blood-flow waveforms in mouse embryos.
- To enable high-frame-rate prospective imaging of the early embryonic mouse heart.
- To facilitate research into embryonic lethal congenital heart diseases.
Main Methods:
- Utilized a continuous wave 40 MHz Doppler ultrasound system to acquire Doppler blood-flow waveforms.
- Developed a real-time algorithm to process Doppler waveforms and generate a cardiac-trigger signal.
- Validated the reliability of heart rate measurement and the robustness of the Doppler trigger algorithm.
Main Results:
- Successfully derived a cardiac-trigger signal from Doppler blood-flow waveforms.
- Demonstrated reliable measurement of heart rate using the Doppler-derived trigger.
- Showed the Doppler trigger algorithm's robustness in tracking blood flow variations.
- Preliminary data confirmed the utility of Doppler-derived triggers for high-frame-rate imaging of embryonic mouse hearts.
Conclusions:
- Doppler blood-flow waveform analysis provides a viable alternative to ECG for cardiac triggering in mouse embryos.
- This new method supports high-frame-rate imaging of early embryonic cardiac function.
- Enables advanced research into embryonic congenital heart diseases using mouse models.
