Impacts of lncRNA H19, miR‐130a‐3p, and miR‐17‐5p on the sensitivity of cardiac cancer cells to chemo‐ and radiotherapies. A, The expressions of H19, miR‐130a‐3p, and miR‐17‐5p were compared between cardiac cancer cells and normal gastric mucosal cells (ie, GES‐1). *Student's t test: P < 0.05 when compared with GES‐1. B, The effects of si‐H19 and pcDNA‐H19 on survival rates of cardiac cancer cells were evaluated after treatments with drugs (ie, cisplatin, adriamycin, mitomycin, and 5‐fluorouracil) and radiotherapy. *ANOVA test: P < 0.05 when compared with NC. C, The effects of miR‐130a‐3p mimic and miR‐130a‐3p inhibitor on survival rates of cardiac cancer cells were evaluated after treatments with drugs (ie, cisplatin, adriamycin, mitomycin, and 5‐fluorouracil) and radiotherapy. *ANOVA test: P < 0.05 when compared with NC. D, The effects of miR‐17‐5p mimic and miR‐17‐5p inhibitor on survival rates of cardiac cancer cells were evaluated after treatments with drugs (ie cisplatin, adriamycin, mitomycin, and 5‐fluorouracil) and radiotherapy. *ANOVA test: P < 0.05 when compared with NC. NC, negative control