15 yr old daughter has raised potassium 5.4mmol, more than once. Resting heart rate (95-110) dizzy, breathless, heart rate at 170 with mild exertion?

Endocrine problem? Pediatric Causes of hyperkalemia and tachycardia are extensive and need an evaluation by a pediatrician. It may be as simple as dehydration or maybe as complex as a hormone disruption causing many metabolic derangements such as addisons disease or hyperthyroidism. .