• PSVT is a rapid rhythm that starts and stops suddenly.
• For accurate interpretation, the beginning or end of the PSVT must be seen.
• PSVT is sometimes called paroxysmal atrial tachycardia (PAT).

Rate: 150–250 bpm

Rhythm: Irregular

P Waves: Frequently buried in preceding T waves and difficult to see

PR Interval: Usually not possible to measure

QRS: Normal (0.06–0.10 sec) but may be wide if abnormally conducted through the ventricles

Clinical Tip: The patient may feel palpitations, dizziness, lightheadedness, or anxiety.