I saw an ad somewhere that claimed 30% of seniors die each year from heart attack. This sounds way, way too much. Is it really true?
In 2000-2001, 2010-2011, and 2012-2013, roughly 30% of deaths over 65 in the USA were due to heart disease (30.9, 30.5, and 29.8).
Perhaps the advertisement simply misstated the claim. Not 30% of those alive, just 30% of the deaths. Also, this is all heart disease, not just heart attacks.
As the other answer notes, overall death rates are far below 30%, so this claim certainly isn't accurately describing that.