Dear Doctors, My father is 65 years old, had suffering from fever and cough, he use to suffer from cough once in a year, Yesterday had an appointment at clinic, doctor advised to take the ECG ECG has been taken, since it's Sunday there was no availability of specialists doctor, The doctor at the hospital advised ECG seems to be normal except sinus Tachycardia The reading of sinus Tachycardia is 812, and shot pr interval is 401 Can Doctors advice if this is normal.