What was Hugo Chávez’s cause of death?

In 2011 Hugo Chávez announced that cancer had been detected in his pelvic area; the type of cancer was not specified. A tumor was removed, and over the next two years he underwent various surgeries and several rounds of chemotherapy, often traveling to Cuba for treatment. According to reports the cancer later metastasized to his lungs, and he began to experience respiratory issues. On March 5, 2013, he suffered a fatal heart attack. According to a Venezuelan general, Chávez was unable to speak at the end, but he mouthed the words “I don’t want to die. Please don’t let me die.”