Cook fettuccine according to package directions.
Meanwhile, place a lightly oiled large nonstick skillet over medium-high heat. Add mushrooms and artichoke hearts; cook and stir until mushrooms are tender. Stir in Alfredo sauce; bring to a boil over medium heat. Reduce heat; simmer, uncovered, 5 minutes, stirring occasionally.
Drain fettuccine, reserving ⅓ cup pasta water. Add fettuccine to artichoke mixture; toss to combine, adding reserved pasta water if desired. Sprinkle with blue cheese.
