Question

identify this rhythm

supraventricular tachycardia
junctional tachycardia
normal sinus rhythm
sinus tachycardia
sinus bradycardia

Explanation:

Analyze the rate and rhythm regularity

The R-R intervals are regular and occur at a rapid rate. There are approximately 11 large boxes spanning 11 R-R intervals, which corresponds to a heart rate of approximately:

$$ \text{Heart Rate} \approx 150\text{ bpm} $$

Identify P-wave morphology and relationship

Each narrow QRS complex is preceded by a distinct, upright P wave in this lead. The PR interval is constant and within normal limits (less than 0.20 seconds), indicating that the rhythm originates from the sinoatrial (SA) node.

Determine the cardiac rhythm classification

A regular rhythm originating from the SA node with a heart rate exceeding 100 bpm is classified as sinus tachycardia.

Answer:

• Supraventricular Tachycardia
• Junctional Tachycardia
• Normal Sinus Rhythm
• Sinus Tachycardia (Correct answer)
• Sinus Bradycardia