The levels of miR-208b (a), miR-122-5p (b), and miR-134 (c) in the EVs isolated from the plasmas of MI patients and healthy individuals, detected by real-time quantitative PCR (RT-qPCR). Normal EVs: EVs isolated from the plasma of the healthy individuals; MI-associated EVs: EVs isolated from the plasma of the MI patients. ∗P < 0.05, compared with normal EVs, n = 3. The levels of miR-208b (d), miR-122-5P (e), and miR-134 (f) in the control and MI-associated EV-transfected HUVECs. Control: HUVECs without treatment; MI-associated EVs: HUVECs transfected with MI-associated EVs. ∗P < 0.05, compared with the control group, n = 3. (g) The cell transfection efficiency evaluated based on the level of miR-208b. #P < 0.05, compared with the control group, n = 3.