The 67-year-old has said attack may be the best form of defence ahead of the meeting with the Blaugrana
Die Roten go into the conclusion of their semi-final tie with a seemingly unassailable lead over their Spanish counterparts after their resounding 4-0 victory over Tito Vilanova's men in the first leg.
Despite the advantage Heynckes has insisted his team will look to pick up where they left off at the Allianz Arena - by scoring goals.
"We should defend with a high line and try to impose our playing style on them," he told the club's official website.
"We need to try and score a goal or two, and it's a possibility. They'll press the ball from the start and try to put us under pressure."
Wednesday's match at Camp Nou is scheduled to kick off at 19.45BST