How dangerous is a high resting blood pulse rate?

It depends on you.: This can be due to a number of reasons. It can be possibly from a heart condition, like arrhythmia, or an electrolyte imbalance like hyperkalemia. Drugs are a major cause and concern, and this can be from an overdose of many therapeutic drugs or use of recreational drugs, like cocaine. This really impacts on how serious this finding is so see your doctor to find out the cause or for a check-up.