intracardiac injection

例句：

1. 1.This medication is administered intracardiacly to treat heart failure.
   这种药物通过心内注射来治疗心脏病。
2. 2.During the surgery, a special needle was used for intracardiac injection.
   在手术期间，使用了一种特殊的针头进行心脏内注射。
3. 3.The patient received an intracardiac injection of antibiotics before surgery.
   患者在手术前接受了抗生素的心脏内注射。