During coronary angiography, a thin tube (catheter) is threaded through a blood vessel into the heart, where a special dye is injected.
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。
2
Each one had suffered severe heart attacks and had a catheter that measured heart damage.
每个病人都得过严重的心脏病，并且用心脏导管来解决心脏损伤。
3
Once the catheter is in the heart, the cardiologist will pass a special device, called a coil or occluder, into the open PDA preventing blood from flowing through it.