200
The follow characterizes this rhythm.
Rate: Greater than or equal to 100.
Rhythm: Regular.
P waves: Upright, consistent, and normal in morphology (if no atrial disease)
P–R interval: Between 0.12–0.20 seconds and shortens with increasing heart rate
QRS complex: Less than 0.12 seconds, consistent, and normal in morphology
What is sinus tachycardia