在冠状动脉造影时，一个细管(导管)通过血管进入心脏，注入一种特殊的染料。
During coronary angiography, a thin tube (catheter) is threaded through a blood vessel into the heart, where a special dye is injected.
目的：介绍小儿重症先天性心脏病(先心病)患儿心导管及造影检查时的麻醉体会。
Objective: To introduce our experience on extra operating room anesthesia of children with grave congenital heart diseases during cardiac catheterization and ventriculography.
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