Dysrhythmia and dizziness and severe muscle pain are few of the symptoms related to electric injury even in low voltage electric injury .It could be as late as 48 hours after contact you experience these symptoms.As you have a history of pre-existing BP with palpitations it may have triggered .however most of the symptoms are likely to settle gradually.If your symptoms persist,
It is better to do an ECG , check your
creatinine levels ,
electrolytes,and urine analysis .If all these investigations are normal you don't need to be concerned