Supraventricular tachycardia

Definition

Supraventricular tachycardia (SVT) is a rapid heart rate originating above the heart's ventricles. It often results in episodes of palpitations and can affect cardiac output.

5 Must Know Facts For Your Next Test

1. SVT is characterized by a heart rate exceeding 100 beats per minute.
2. Adenosine is commonly used to terminate acute episodes of SVT.
3. Electrocardiogram (ECG) is essential for diagnosing SVT by identifying abnormal P waves or narrow QRS complexes.
4. Beta-blockers and calcium channel blockers are often prescribed for long-term management of SVT.
5. Vagal maneuvers, such as carotid massage, can sometimes help to slow down the heart rate during an episode of SVT.

Review Questions

• What medication is frequently used to terminate acute episodes of supraventricular tachycardia?
• Which diagnostic tool is crucial for identifying supraventricular tachycardia?
• Name two types of drugs that are typically used for the long-term management of SVT.

Related terms

Atrial Fibrillation: An irregular and often rapid heart rate that can lead to blood clots, stroke, and other complications.

Vagal Maneuvers: Techniques such as holding your breath or coughing to stimulate the vagus nerve and slow down the heart rate.

Adenosine: A drug used in emergency settings to convert certain types of arrhythmias back to a normal sinus rhythm.