The Story of an Hour -what lead the young woman's death in this story?

There are some elements that lead Louise's death. First, in the beginning of the story, Louise is a wife who suffers from "heart trouble," After she learns of her husband's death, she is initially overcome with grief. But quickly she begins to feel a previously unknown sense of freedom and relief. Second, after her own feelings come upon her, possessing her,She become aware of her own desires, enjoying the prospect of being freed from the confines of marriage. Third, when she first utters the Words "free, free, free!" she has "abandoned herself." But after that, she relaxes and gains more control over her. As she imagines life without her husband, she embraces visions of the future. She realizes self-assertion is more important than her husband's love. The last thing is that, the happiness Louise gains by this recognition of selfhood is so strong that, when she realizes her husband is alive, she immediately collapses. She could not bear to abandon her newfound freedom and return to life with her husband, so she came to death.