Final answer:
Criteria used to identify a rhythm as supraventricular tachycardia (SVT) include a rapid and regular heartbeat, a narrow QRS complex on an ECG, and the absence of P waves.
Step-by-step explanation:
Supraventricular tachycardia (SVT) is a type of arrhythmia characterized by a rapid heart rate originating above the ventricles. It can be identified based on certain criteria:
- Rapid and regular heartbeat: The heart rate is usually greater than 100 beats per minute and has a regular rhythm.
- Narrow QRS complex: The QRS complex on an electrocardiogram (ECG) appears narrow, indicating that the electrical signal is originating from above the ventricles.
- Absence of P waves: In SVT, the P waves may be absent on the ECG or may be buried within the QRS complex.
Other symptoms and diagnostic tests, such as an ECG and Holter monitor, may also be used to confirm a diagnosis of SVT.