Standing Echocardiography
Standing Echocardiography - Related Videos
09:32
Standing Waves
0 Views •
2023
Source: Arianna Brown, Asantha Cooray, PhD, Department of Physics & Astronomy, School of Physical Sciences, University of California, Irvine, CA Standing waves, or stationary waves, are waves that appear not to propagate and are produced by the interference of two waves traveling in opposite directions with the same frequency and amplitude. These waves appear to vibrate up and down with no linear movement and are most easily identified in vibrating finite media like a plucked guitar string,...
01:17
Standing Waves
0 Views •
2023
Sometimes waves do not seem to move; rather, they just vibrate in place. Unmoving waves can be seen on the surface of a glass of milk kept in a refrigerator, which is one example of standing waves. Vibrations from the refrigerator motor create waves on the milk that oscillate up and down but do not seem to move across the surface. These waves are formed or created by the superposition of two or more identical moving waves in opposite directions. The waves move through each other, with their...
08:04
Murine Fetal Echocardiography
0 Views •
Cited by 7 •
2013
Fetal and perinatal death is a common feature when studying genetic alterations affecting cardiac development. High-frequency ultrasound imaging has improved 2-D resolution and can provide excellent information on early cardiac development and is an ideal method to detect the impact on cardiac structure and function prior to death.
08:09
Transthoracic Echocardiography in Mice
0 Views •
Cited by 81 •
2010
Transthoracic echocardiography offers a noninvasive method for the evaluation of cardiac function in mice. A combination of ultrasound and Doppler imaging modalities can be used to obtain dimensional measurements of the heart and intracardiac blood flow, which together provide an assessment of cardiac systolic and diastolic performance.
09:00
Murine Echocardiography and Ultrasound Imaging
0 Views •
Cited by 61 •
2010
This video demonstrates use of a rail-mounted high-frequency ultrasound probe to perform echocardiography on an anesthetized mouse. The methods describe both conventional two-dimensional and M-mode measurements of cardiac function in addition to newer, more powerful tools such as color Doppler, strain analysis, as well as general and targeted contrast imaging.
FAQs
The upright position changes venous return and cardiac loading, which can alter how much blood enters the chambers and how the left ventricle ejects blood. These physiologic shifts may expose abnormalities that remain subtle while the patient is supine. In practice, posture acts as a hemodynamic challenge, helping clinicians determine whether symptoms or abnormal flows depend on loading conditions.
Doppler measurements show the direction and velocity of blood flow through the heart. Comparing these flow patterns under upright loading conditions can reveal posture-related changes in valvular flow or movement of blood through the left ventricular outflow tract. This information complements structural images by showing how the heart functions dynamically rather than only how its chambers appear.
The principal difference is the physiologic condition being assessed, not the ultrasound principle itself. Supine imaging provides information while the patient is lying down, whereas the standing examination evaluates cardiac structure and flow after posture alters venous return and loading. Comparing the two positions can identify abnormalities that are less apparent under customary supine conditions.
Standing changes cardiac filling and loading, which can modify blood movement through the left ventricular outflow tract. In susceptible patients, these posture-dependent changes may make an obstruction more evident than it is during supine imaging. Identifying this response is clinically relevant because it connects the measured flow abnormality with the conditions under which symptoms or exertional limitation occur.
The examination uses a transducer to obtain real-time cardiac images while the patient remains upright. Clinicians can assess heart structure and function, then use Doppler to evaluate blood-flow direction and velocity under that posture. The resulting information shows whether chamber filling, valvular flow, or left ventricular outflow tract behavior changes when upright.
Standing echocardiography may be considered when exertional symptoms remain unexplained or when clinicians suspect a posture-sensitive hemodynamic problem. It has particular relevance for selected patients with hypertrophic cardiomyopathy, as well as for people with other disorders in which cardiac filling or outflow may change with loading conditions.
It can demonstrate changes in chamber filling, valvular flow, and left ventricular outflow tract obstruction that occur with upright posture. These findings help clinicians assess whether cardiac performance changes under conditions resembling standing or exertion. The examination therefore adds functional context to structural imaging and may clarify why symptoms are provoked in particular situations.
In selected patients with hypertrophic cardiomyopathy, upright loading may reveal left ventricular outflow tract obstruction or altered filling that is less obvious when lying down. Detecting these posture-dependent effects helps characterize the patient’s hemodynamic behavior. The same principle extends to other hemodynamic disorders when symptoms or abnormal flow appear linked to changes in cardiac loading.