KnowraEchocardiographyEchocardiographyEchocardiography uses ultrasound to create images of the heart, showing its structures, motion, and blood flow.BriefConnectUltrasound: Sound waves with frequencies above the range of human hearing, used in imaging and measurement. Echocardiography applies ultrasound waves to image the moving heart.Ejection fraction: The percentage of blood in a ventricle expelled during one heartbeat. Echocardiography commonly estimates left ventricular ejection fraction to assess pumping function.Acoustic impedance: A measure of how strongly a material resists the passage of sound waves. Differences between tissues create the echoes used to form cardiac images.Cardiac magnetic resonance imaging: Magnetic resonance imaging used to assess the heart’s structure, function, tissue, and blood flow. It provides detailed tissue characterization without relying on ultrasound windows.Doppler ultrasonography: An ultrasound technique that measures motion from changes in the frequency of reflected sound waves. It estimates blood-flow direction and velocity through the heart and its valves.Valvular heart disease: Disease in which one or more heart valves are narrowed, leaky, or otherwise dysfunctional. Ultrasound shows valve anatomy and measures the consequences of abnormal flow.Ultrasound transducer: A device that converts electrical energy into ultrasound and returning echoes into electrical signals. The transducer sends pulses into the chest and detects their reflections.Cardiac computed tomography: X-ray computed tomography tailored to image the heart and coronary vessels. It offers high-resolution anatomy, especially of coronary arteries and calcification.M-mode echocardiography: An ultrasound display that plots the position of moving structures along one beam over time. Its high temporal resolution tracks rapid valve and wall motion.Cardiomyopathy: A disease of the heart muscle that can impair its structure or pumping function. Images reveal chamber enlargement, wall thickness, and impaired contraction.Show all 22Linked from 58 pagesMedical imagingBroader topic: It assesses cardiac structure and function without surgery or ionizing radiation.Heart failureRelated: It evaluates ventricular function, valves, and other causes of the syndrome.Doppler ultrasoundNarrower topic: Doppler methods measure flow across heart valves and within cardiac chambers.ElectrocardiogramCompared with: It shows mechanical function and anatomy rather than recording surface voltage.UltrasonographyBroader topic: It applies real-time imaging and Doppler methods to cardiac structure and function.EdemaRelated: It can identify cardiac dysfunction when edema accompanies heart failure.Pulmonary edemaRelated: It helps identify cardiac dysfunction underlying pressure-related pulmonary edema.Pulmonary circulationRelated: It can estimate pulmonary pressures and reveal effects of impaired lung-circuit flow.Show all 58