…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…

…of gain applied to incoming sound waves. This is done using gain control or time gain compensation (TGC) . Figure 1. TGC (time gain compensation) and…

…tip, using the thumb and the forefinger, while remaining fingers stabilize the grip. The transducer tends to glide out of position due to the gel…

…radius and area of PISA are calculated as follows: area PISA = 2 • π • r PISA 2 The flow (Q) can be calculated using PISA…

…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…

…the direction of blood flow or tissue motion. Ideally, there should be no angle (0°) between the ultrasound beam and the direction of blood flow…

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

…The Doppler Equation). Any angle error between the Doppler beam and the blood flow will result in an underestimation of the velocity. In clinical practice…

…if the premature beat reaches the atrioventricular node before it has repolarized completely. The earlier the impulse reaches the atrioventricular node (and bundle of His)…

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…