Brant,
I was using the term "heart attack" in the popular sense of covering all heart failure. But you are correct and that's a bad habit I have. There is a difference between myocardial infarction and CHF. Rand most likely had the latter. Here is one source from the Objectivism Reference Center's
Ayn Rand Biographical FAQ (with the two footnotes):
QUOTE(ORC)
6.10 Did Rand die from lung cancer?
No. The reported cause of Rand's death was heart failure.[*]
A few authors, apparently careless with their research, have stated that Rand died of lung cancer. Rand was diagnosed with lung cancer in 1974, but she underwent surgery, which she reported to be "a complete success." She also stopped smoking at this time. There is no evidence that she experienced any recurrence of the cancer or that it was directly involved in her death, which did not come until 1982.[*]
[*] Section 6.10, note 1: Harry Binswanger, "To the Reader," The Objectivist Forum 3:1 (February 1982), p. 1. See also Sense [Ayn Rand: A Sense of Life by Michael Paxton], p. 184, Rand [Ayn Rand by Jeff Britting], p. 118, and Passion [The Passion of Ayn Rand by Barbara Branden], pp. 402-403.
[*]Section 6.10, note 2: Rand's lung cancer is discussed in Passion [The Passion of Ayn Rand by Barbara Branden], pp. 379-385, and Rand [Ayn Rand by Jeff Britting], p. 108. (It is also mentioned in a number of other places, such as Ronald Merrill, The Ideas of Ayn Rand, p. 147, but it is likely that these authors got their information from Branden rather than from an independent source.) Both Branden and Britting indicate that Rand had surgery to treat the cancer, and that her death several years later was from heart problems. Rand did not reveal in public that she had cancer, but she did refer to an unspecified "illness" in The Ayn Rand Letter. In the issue dated August 12, 1974, she said that "the operation was a complete success."
Michael