Rich, Mrs Joe has episodes of tachycardia where her heart rate goes as high as 180 for hours on end. It was happening every few months, we’d ring an ambulance and they’d take us to A&E, all bloods were normal as were heart scans. She eventually discovered she has a severe allergy to caffeine. She totally avoids it now, but she did get “spiked” by a careless barista last year after ordering a decaf coffee, ambulance took an hour and 15 minutes to arrive, when it did turn up it was on blues and two’s! She has a pack of beta blockers on standby. I do feel for you as it’s very scary when it happens.
Enyaq EV