Final answer:
A thrombectomy catheter is used to dissolve and suction thrombus during an acute MI.
Step-by-step explanation:
The device used to dissolve and suction thrombus during an acute MI is called a thrombectomy catheter. This device is inserted into the blocked blood vessel and is used to break up and remove the clot causing the myocardial infarction. The catheter can be equipped with various mechanisms, such as mechanical devices or ultrasound waves, to help dissolve and suction the thrombus.