A patient complains of palpitation after stress. The pulse is 104 bpm, P-Q=0,12 seconds, there are no changes of QRS complex. What type of arrhythmia does the patient have?

Answer options

1. Sinus arrhythmia
2. Ciliary arrhythmia
3. Extrasystole
4. Sinus bradycardia
5. Sinus tachycardia

Explanation

ECG of sinus tachycardia shows P–R interval: Between 0.12–0.20 seconds and shortens with increasing heart rate.