Hi. I have chronic tachycardia; That's the actual term. There are meds and other treatments that can stop this, but often it's just lupus causing inflammation for a few months, then it passes. It's frustrating, but you can live with it. The first few months I would go to the ER when it got really bad and a few times they had to shock my heart back to normal speed and rhythm, but then it happened every day, and I couldn't go to the ER every day, so I just live with it. I use a pulse oximeter that you put on your finger that tells your heart rate (pulse) and oxygen levels. Often when I even stand up and walk, my heart rate goes up to 140 or so. I just figure that it's the same as getting an aerobic workout, where you purposely TRY to get your heart rate to go that high, so if that's good for you, I must be extra strong in the heart department. ha! I was diagnosed with POTS, which is Postural Orthostatic Tachycardia Syndrome. It means when I change my posture from laying or sitting to standing and walking, my heart rate goes crazy. There are millions of us who live with it. There are support groups for we who have it, on Facebook and other places online. There are societies centered around the condition. The only time it's life threatening is if your heart rate goes over 200. At that point you DO need the ER and need to get them to slow down your heart. At that point, your heart is not truly pumping blood, it is just fluttering and can stop. I have had my heart stop more than a few times, but I have always been resuscitated. It's not considered a heart attack, because it doesn't involve blocked arteries and doesn't cause heart damage. One Dr. thinks this could be caused by inflammation (lupus causes inflammation) to the vagus nerve, a nerve that goes from your skull to your heart and stomach, down the sides of your neck. Since I also have irritated nerves (neuralgias) of other nerves in my skull, that's the most sensible answer. Others can try anti-inflammatories and beta blockers, but I can't take either, so what can't be cured must be endured in my case. Don't let it alarm you too much, because fear also raises your heart rate. It's scary, but you can live with it. I have gotten used to it, and I don't panic when it happens. It will probably go away if it's just a lupus problem. I get some strange symptom for a few months, then it disappears and something else shows up. Very strange and cruel disease.