A 47-year-old man is extracted from an automobile after a motor vehicle accident.The patient has a steering wheel bruise on the anterior chest.His electrocardiogram（ECG）shows some premature ventricular complexes，and his cardiac isoenzymes are elevated.There is suspicion of a cardiac contusion.Which of the following is true regarding a cardiac contusion？
选项：

A:Elevated
B:The
C:G
D:Cardiac
E:Echocardiography
F:All