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.
心血管导管造影是诊断冠心病的金标准。
Cardiac catheterization with angiography is the reference standard for diagnosing CAD.
目的：评价急性消化道大出血的血管造影诊断和经导管介入治疗的价值。
Objective: To evaluate the value of angiographic diagnosis and transcatheter interventional treatment in patients with acute gastrointestinal bleeding.
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