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Colour flow Doppler echocardiography in normal horses
1Department of Veterinary Clinical Studies, University of Edinburgh, Royal (Dick) School of Veterinary Studies, Midlothian, UK.
Insights
Colour flow Doppler echocardiography reveals normal heart blood flow patterns in horses. This sensitive technique aids in detecting intracardiac flow and evaluating valvular function in equine cardiology.
Area of Science:
- Veterinary Cardiology
- Echocardiography
- Equine Physiology
Background:
- Colour flow Doppler echocardiography enhances two-dimensional echocardiography for studying cardiovascular dynamics.
- Understanding normal intracardiac flow is crucial for diagnosing valvular heart disease in horses.
Purpose of the Study:
- To define normal blood flow patterns in the equine heart using colour flow Doppler.
- To evaluate valvular function in clinically normal Thoroughbred horses.
Main Methods:
- Utilized colour flow Doppler echocardiography in 40 clinically normal Thoroughbred and crossbred horses.
- Analyzed flow patterns from 10 standardized echocardiographic views relative to cardiac anatomy and cycle timing.
Main Results:
- Consistent intracardiac flow patterns were identified in normal horses.
- High-velocity signals or regurgitant jets were detected at the tricuspid (77.5%), mitral (67.5%), aortic (47.5%), and pulmonary (40%) valves.
- Most detected signals were transient and often associated with valve closure.
Conclusions:
- Colour flow Doppler echocardiography is a sensitive method for detecting intracardiac flow in horses.
- This study establishes a baseline for comparison in horses with suspected valvular heart disease.
Abstract:
Colour flow Doppler echocardiography is a technique that is used with two-dimensional (2-D) echocardiography to study blood flow patterns in the heart and blood vessels. This method was used to define normal flow patterns and to evaluate valvular function in 40 clinically normal Thoroughbred and Thoroughbred cross horses. Flow patterns from 10 standardised echocardiographic images were described in relation to anatomic landmarks and timing during the cardiac cycle. Consistent intracardiac flow patterns were identified in the normal horses. High velocity flow signals or regurgitant jets were recorded at the tricuspid (77.5%), mitral (67.5%), aortic (47.5%) and pulmonary valves (40%) in clinically normal horses. Most of these signals were transient, and many were associated with valve closure. This study demonstrates that colour flow Doppler echocardiography is a sensitive technique for the detection of intracardiac flow in horses. It will provide a basis by which to compare studies in horses suspected of having valvular heart disease.