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TELECONFRENCES
2004
The Changing Left Ventricle

2003
Aortic Valve Disease: New Dimensions in Evaluation and Management

2002
Heart Failure: Echo's Role in and Emerging Health Crisis

2001
Chest Pain in Children & Adults: The Role of Echo

2000
Mitral Regurgitation: New Concept

1998
The Falling Left Ventricle: Diastolic & Systolic Function

1997
Changing the Outcome of Coronary Artery Disease
ECHO GRAND ROUNDS
Digital Integration
LEARN THE BASICS
Echocardiography
Doppler Echo
VIDEO ARCHIVES

Chest Pain in Children and Adults

Mitral Regurgitation: New Concepts

Diastolic and Systolic Function

Changing the Outcome of CAD

BROADCAST SUPPLEMENTS
2000 MV
2001 Chest Pain
2002 Heart Failure


The Doppler Principle and the Study of Cardiac Flows
The Doppler Equation
Fig.1.6

This Doppler effect in tissues maybe expressed as an equation as shown in Figure 1.6. Simply stated, the Doppler shift (Fd) of ultrasound will depend on both the transmitted frequency (fo) and the velocity (V) of the moving blood. This returned frequency is also called the "frequency shift" or "Doppler shift" and is highly dependent upon the angle (?) between the beam of ultrasound transmitted from the transducer and the moving red blood cells. The velocity of sound in blood is constant (c) and is an important part of the Doppler equation.

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