A nurse obtained a client’s pulse and found the rate to be above normal. The nurse document this findings as: TachypneaHyperpyrexiaArrhythmia Tachycardia Explanation. Tachycardia means rapid heart rate. Tachypnea (Option A) refers to rapid respiratory rate. Hyperpyrexia (Option B) means increase in temperature. Arrhythmia (Option C) means irregular heart rate.