Preheat oven to 400 F. Butter either 2-3 individual casserole dishes or a 9 x 9-inch baking dish. Set aside. Drain marinated artichoke hearts (reserving 2 Tbsp) & halve each piece. In a large bowl, whisk together soup, Alfredo sauce, Worcestershire, artichoke marinade, salt & pepper until combined. Gently stir in cooked rice, mushrooms, artichokes, shrimp (cut each in thirds) & parsley.