<unk>  is a procedure which uses ultrasound technology to examine the heart by creating an image of it and measuring the speed and direction of blood flow. This procedure is frequently used to examine children's hearts for heart disease because there is no age or size requirement.
Continuous generation of ultrasound waves coupled with continuous reception Two crystal transducer with dual function: one crystal<unk> voted to generation, one for receiving
Measures all velocities along transducer beam<unk> nsity of signal can be compared to forward flow
Shape of flow curve gives information about pressure gradient across the valve
Advantage:  ability to measure high blood flow velocities accurately
Disadvantage:  lack of selectivity or<unk> pth discrimination
Doppler echocardiography
Coronary artery calcium scoring
Pulseless electrical activity echocardiography
Cardiac electrophysiology
Quantitative coronary angiography
Torsades de pointes echocardiography
Fractional flow reserve
Shock electrocardiogram