It’s a complete guess unless you took the precaution of cashing your winners first before playing the heart suit.

West has already shown up with 5 diamonds.
If you cash all your spades you find that West started with 4 spades.
When you cash your clubs you find that West started with 2 clubs

West’s shape is therefore 4 ♠ – 2 ♥ – 5 ♦ – 2 ♣

YOU FINESSE THE ♥ 10 WITH 100% CERTAINTY.

COUNT THE HAND BEFORE COMMITTING TO A CRITICAL FINESSE.