Final answer:
The key step in the Heimlich Maneuver is to perform upward thrusts until the item is forced out.
Step-by-step explanation:
The key step in the Heimlich Maneuver is to perform upward thrusts on the victim until the item is forced out or ambulance arrives. This action helps to dislodge an object that is blocking the airway. The upward thrusts create pressure that can help to expel the object from the victim's throat.
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