Reprint request to Division of Diagnostic Radiology, University of Rochester School of Medicine and Dentistry, 260 Crittenden Blvd, Rochester, NY 14642 (Dr. Gramiak).
Edited by Z. Danilevicius, MD, Senior Editor.
ULTRASONIC examination of the heart represents one of the new, developing examination modalities that has attracted considerable attention and offers promise as an important diagnostic tool in cardiac disease. Its popularity stems directly from its noninvasive, nonionizing nature, which permits easy examination, even at the bedside if necessary. The unique ability of ultrasound to differentiate solid structures of the heart from the blood without the use of contrast agents can be used to obtain information about cardiac structure. Records of the movement of cardiac elements also offer important information about heart function. I shall describe this examination technique and indicate conditions in which ultrasonic examination is valuable clinically.
History The development of naval sonar devices in the years after World War I represents the beginning of the technology on which echocardiography is based. High-speed oscilloscopes, developed for the nondestructive testing of metals, provided the link between the long-range sonar devices
Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature
Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal
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