What Are The Risks Of Having Frequent Premature Atrial Contractions?

I am a 45 year old male. 5'8" tall and 210 pounds. I was diagnosed four years ago with premature atrial contractions and was told that the condition is stress related. I had already cut down on caffeine and alcohol and I am a nonsmoker. The PAC's have recently become more frequent and I attribute this to a more stress related year on the job. During my initial EKG and sonograms, no abnormalties were discovered and the event monitor recorded a few PAC instances. My cardiologist and primary both told me that I could live with the condition. Am I at an increased risk since the PAC's have become more frequent? Thanks.