DH has had "flutterings" in chest/stomach for the past week and saw GP today who has referred him to a cardiologist. He had an adrenaline injection for a dental procedure last week and it started after that. I was sure the two were related and it would wear off and am a bit shocked at the referral. Is this serious? I am worried now. Has anyone any experience of arrythmia? I'm watching DH like a hawk and dont know CPR and quite frankly worried sick.