a cardiac catheter的用法和样例：
- I think homeboy's having a cardiac emergency.
- Hemodynamic parameters were measured by left cardiac catheter and left ventricular cineangiography.
- He died after suffering a cardiac arrest (= when his heart suddenly stopped).
- The champion of the 1960s suffered a cardiac arrest on December 26th.
- He died of a cardiac arrest, Turkmen state television reported.He was 66.