My tachycardia is postural, my resting pulse is around 65 and it goes up to 90 when I stand up - when I first noticed it was up to 128 just walking around the house. It is exacerbated by exercise (walking upstairs can raise it to 110, going for a walk to 125, once 150), raising my arms (carrying laundry downstairs or sitting to chop vegetables raises it to 125, even brushing my teeth raises it), heat (gardening on a warm day made it 140), and eating (rise to 90 when seated). Alcohol sometimes exacerbates it, caffeine doesn’t and might well improve it.
The paramedic on my second trip to casualty did a seated and standing pulse and BP and suggested Postural Orthostatic Tachycardia Syndome. I have since researched this (I am an ex-nurse) and it fits my symptoms and circumstances, especially as a post-viral autonomic response. I have instigated suggested lifestyle changes including increased fluid intake, slow transition on rising, wearing light compression running leggings, gentle yoga and taking a daily morning walk with regular rests and water.
I think water intake has had an enormous effect. Taking water 20 minutes before getting up in the morning has resulted in a normal pulse on rising. I can now, most days, walk around the house without tachycardia as long as I keep my fluid intake up. My morning walk pulse is gradually improving too. Arm raising is still an issue but I am aiming to increase my upper body strength with seated and supine yoga.
I have to avoid fatigue, though. If I push myself too far I can get fatigue for the next few hours or even the next day. The best solution for the tachycardia is to sit on the floor cross legged, that results in an immediate drop in pulse. If I am outside I stand with legs crossed.
Obviously I am in a better state than many people recovering from covid as I was not hospitalised and did not spend my symptomatic two weeks on bed rest so my body is not very deconditioned. I am well enough to do my usual online teaching job and carry out activities of daily living despite my tachycardia. But I thought I would share my experience of dealing with post-covid tachycardia in the hope that it might be useful for other people.
(Hopefully once I’ve beaten the tachycardia I can find a solution to my strange lung pressure issue! I can’t bear high air pressure and get air hunger, especially at rest. I’m hoping increased exercise will lead to greater lung expansion)