Salgado L
Serviço de Medicina Nuclear, Instituto Português de Oncologia de Lisboa.
Rev Port Cardiol. 1994 May;13 Suppl 3:47-50.
Radionuclide angiography (RNA), performed by the equilibrium technique, is a non invasive method for the evaluation of ventricular function. RNA is performed after labelling the blood pool with a small amount of radioactivity. Image acquisition is gated to the patient's electrocardiogram. Serial images of the cardiac area are recorded over several cardiac cycles. After processing, it is possible not only to assess the cardiac activity visually but also to obtain quantitative parameters of cardiac function. Ventricular ejection fraction can be easily calculated from the time activity curve. Besides global ejection fraction, other parameters can be obtained, such as regional ejection fraction, peak filling and peak emptying rates and time to peak filling and peak emptying. Valuable additional information can be obtained from these and other parameters, for the diagnosis, evaluation of extension and prognosis of Coronary Artery Disease. Valvular Heart Disease and Cardiomyopathies are other areas in which RNA at rest or during exercise (or pharmacological interventions) has given an important contribution.
放射性核素血管造影术（RNA）采用平衡技术进行，是一种评估心室功能的非侵入性方法。RNA是在向血池注入少量放射性物质进行标记后进行的。图像采集与患者的心电图同步。在几个心动周期内记录心脏区域的系列图像。经过处理后，不仅可以直观地评估心脏活动，还可以获得心脏功能的定量参数。心室射血分数可以很容易地从时间-活度曲线计算得出。除了整体射血分数外，还可以获得其他参数，如局部射血分数、峰值充盈率和峰值排空率以及达到峰值充盈和峰值排空的时间。从这些参数和其他参数中可以获得有价值的额外信息，用于冠状动脉疾病的诊断、范围评估和预后判断。瓣膜性心脏病和心肌病是RNA在静息状态或运动（或药物干预）期间发挥重要作用的其他领域。
