Hi there Ive had a difficult day I keep on having pvcs and they are really freaking me out. However I went to see Gp today and she asked me if I ever drank diet coke or diet drinks and I do lots of them. I had 3 cans today. Anyway she told me that it contains something called aspartame which is an artificial sweetener in diet drinks and can cause pvcs. I have atrial fibrilation normally under control but now Im wondering if it is diet drinks causing my AF and pvcs. What do people think?