Complex sentence: At a Toronto appearance in October 2009, Munro indicated that she had received treatment for cancer and for a heart condition requiring coronary-artery bypass surgery; she revealed that her next work would involve a theme of sexual ambivalence.
Split into simpler sentences: At a Toronto appearance in October 2009, Munro indicated that she received treatment for cancer and a heart condition, the latter requiring bypass surgery. Also at that appearance, she said her next work would involve a theme of sexual ambivalence.