Hey Jenn,<br /><br />I didn&#39;t know that you couldn&#39;t give blood if you have had a heart attack............that&#39;s a bummer.........Ken does it every 16 weeks as when he give he gives a double shot.............Do you mean can he give bone marrow? That is an interesting question........Unfortunately I checked a site and it said if you have had a heart attack you cannot donate.........So<br /><br />