…The pulsed Doppler beam can be positioned using color Doppler (to visualize the direction of flow) and continuous Doppler (to locate the maximum flow velocities…

…is done using high frequency waves. The frequency of the ultrasound wave must generally be reduced in order to visualize objects located far away from…

…distances between the ribs increase, providing larger windows for the ultrasound beam. The operator can sit on either side of the patient, depending on preferences…

…Measuring the radius of PISA. Color Doppler is used to revealing PISA. As discussed earlier, aliasing occurs when using color Doppler to analyze velocities greater…

…that of reverberations. Figure 4. Mirror image artifact. Side lobe artifact A 2D image is formed by allowing the ultrasound beam to sweep back and…

Echocardiography The Doppler effect When sound waves hit objects some of the sound waves are reflected back to the sound source. If the reflector (i…

…muscles are considered part of the left ventricular cavity. Other dimensions– including atrial dimensions, mitral annulus, aortic annulus, etc –are measured using the blood tissue…

…general, v is the maximum velocity measured using Doppler. Moreover, the first part of the formula (0.5 • D blood ) can be approximated to 4…

…beat). This yields more time to fill the ventricles with blood (increased ventricular filling). Persons with premature beats might perceive this as palpitations, because of…

CPR ECG 1 . The initial rhythm is atrial fibrillation. The fifth beat is a ventricular premature beat. A ventricular tachycardia (VT) emerges. As evident, ventricular…