Inadvertently answered the phone because I was expecting another call, and had just got out of the shower.
(Silly me.) Some lady from American Heart Association? giving me a bunch of "crap" about heart disease.
Have blocked. Sounds like another scam song and dance.
Phone rang 4 times but they did not leave a message. CID showed "Unavailable". Other commenters here say it is the American Heart Association. They have called my number using eight different numbers going back to last October:
214-305-2151
214-506-7289
214-903-4450
866-211-1876
866-619-5010
877-213-2767
877-353-1611
888-355-7209