Cardiothoracic Imaging
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ERNA nuclear images - Equilibrium radionuclide angiograms



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Technetium radioactive labeling of red blood cells which are stable enough to permit equilibrium imaging of the major vessels and cardiac blood pool primarily of the cardiac chambers, when gated with the electrocardium into 15 to 20 time segments between systole and diastole, create a radionuclide angiogram from which calculation of ventricular ejection fraction, regional wall motion, and general chamber sizes can be assessed. These blood pool images are known variously as MUGA (multi-gated acquisition) or more conventionally, ERNA (equilibrium radionuclide angiogram). This technique is considered one of the most accurate for estimating left ventricular systolic function.

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December 18, 2004 (PL)
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