Sinus Tachycardia

Should have P ,Q, R,S and T waves

P wave should be followed by QRS complex , and QRS complex followed by T wave

P - R interval should be between 3 to 5 small boxes

QRS complex should be narrow ,i.e. between 1-3 small boxes

R -R interval should be regular

Heart rate should be between (>100 bpm)

Should have pulse