@Perry13. This is an old thread, but I have PoTS (hence the user name). I was diagnosed at age 46, traced back to when I was age 7 as, in my case it’s secondary to Ehlers Danlos Syndrome. My teenage son also has both PoTS and EDS.
New guidelines say a TTT is not necessary for diagnosis. A positive active stand test is sufficient and to be honest, TTTs are a horrible experience, so best avoided if you already have a diagnosis, unless absolutely necessary. For a diagnosis they need to see a sustained. 30+ beat rise in heart rate on standing, usually with no concurrent drop in BP, but some people can have Orthostatic Hypotension and/or Vasovagal Syncope in addition to PoTS.
Why are you reluctant to try the Ivabradine? It’s a game changer for a lot of people. It doesn’t drastically reduce the hr increase, but for some reason it blunts the constant over-reaction of adrenaline, so you are less exhausted, with fewer symptoms. I have been on it for five years now and my 17 year old son has been on that - alongside midodrine - for two years. As well as the meds, salt and fluid, the Cardiologist should have advised you to try medical grade compression stockings, which your GP can arrange to get you fitted for. Waist high is preferable, if not full-leg/thigh highs are the next best thing, although my son wears knee highs, as he can’t tolerate them any longer. Also, if you are drinking more fluid, adding in a couple of electrolyte drinks a day might also help with symptoms, we use the Nuun dissolvable tablets, which you can buy from sports shops and/or Amazon. They don’t have synthetic sweeteners in like a lot of other brands, which is preferable.
You will get fluctuations in severity, so that will mean some days the increase may not be as bad and others it might be quite dramatic. Dehydration, any sort of illness/virus, poor sleep, getting stressed or overtired can all contribute to making it worse and sometimes we just get ‘crashes’ for no apparent reason that can last a few days, a few weeks or even months. Anything that affects your autonomic nervous system or pushes your adrenaline up can trigger a flare up.
The quality of life of a PoTS patient is described as being similar to that of someone with COPD. The extreme levels of exhaustion and autonomic led adrenaline surges really take it out of you and rest doesn’t really help. Learning to pace effectively is the key to getting a handle on managing things better. Despite the exhaustion, you need to maintain muscle mass to help your body push blood back to where it’s needed when you stand. Starting with reclined/floor based exercises or a reclining exercise bike or rower, just for a couple of minutes a day to begin with is the best way forward.
Lots of information on the PoTS UK website and have a watch of some of the York Cardiology/Dr Gupta videos on YouTube as well, as they’re really reassuring. The ones about sleep are particularly interesting.