Answer
$[A,2,3,4,5,6,7,8,9,10,J,Q,K]$
Work Step by Step
In a standard $52$ card deck, there are a total number of $13$ heart cards. This involves $1$ ace of hearts, $1$ Jack of hearts, $1$ Queen of hearts, $1$ King of hearts, and the rest are cards from $2$ to $10$ of hearts.
So, the sample space in this case would be:
$[A,2,3,4,5,6,7,8,9,10, J,Q, K]$