Research Article

Effects of β-Adrenoceptor Subtypes on Cardiac Function in Myocardial Infarction Rats Exposed to Fine Particulate Matter (PM2.5)

Figure 4

Effects of drug interventions on myocardial apoptosis in MI-induced CHF rats. Myocardial apoptosis was detected by TUNEL staining. (a) Representative photomicrographs of TUNEL staining are shown in sham group, MI group, and MI-induced CHF rats treated with metoprolol, terbutaline, and metoprolol plus terbutaline. (b) Quantification of TUNEL positive cardiomyocytes. versus sham. versus MI.
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