AV nodal reentrant tachycardia Flashcards
What is AV nodal reentrant tachycardia (AVRT)?
A type of supraventricular tachycardia that involves a reentrant circuit in or near the atrioventricular node.
True or False: AVRT is the most common form of paroxysmal supraventricular tachycardia.
True
What are the two main types of AVRT?
Orthodromic AVRT and antidromic AVRT.
Fill in the blank: The reentrant circuit in AVRT typically involves the _____ node.
atrioventricular
What is the typical heart rate during an AVRT episode?
150 to 250 beats per minute.
Which population is most commonly affected by AVRT?
Young adults, particularly those with pre-existing heart conditions.
What is a common symptom of AVRT?
Palpitations.
True or False: AVRT can lead to serious complications if untreated.
True
What is the most common treatment for AVRT?
Vagal maneuvers or pharmacological agents like adenosine.
Multiple Choice: Which of the following is NOT a treatment for AVRT? A) Vagal maneuvers B) Adenosine C) Beta blockers D) Defibrillation
D) Defibrillation
What diagnostic tool is primarily used to confirm AVRT?
Electrocardiogram (ECG).
In antidromic AVRT, what pathway does the impulse travel?
The impulse travels down an accessory pathway and back up through the AV node.
True or False: Patients with AVRT often experience syncope.
False
What is the role of adenosine in treating AVRT?
Adenosine temporarily blocks conduction through the AV node, terminating the reentrant circuit.
Fill in the blank: The accessory pathway in AVRT can be _____ or _____ in nature.
antegrade, retrograde
What is a potential long-term treatment option for recurrent AVRT?
Catheter ablation.
Multiple Choice: Which of the following is a risk factor for developing AVRT? A) Hypertension B) Structural heart disease C) Hyperlipidemia D) Diabetes
B) Structural heart disease
What is the primary mechanism of AVRT?
Reentry due to dual conduction pathways in the AV node.
True or False: AVRT can occur in individuals with normal hearts.
True
What is the term for the sensation of a rapid heartbeat experienced during AVRT?
Palpitations.
What does the ECG of AVRT typically show?
Narrow QRS complexes with a regular rhythm.
Fill in the blank: AVRT can be triggered by _____ or _____ activities.
stress, caffeine
What is the significance of recognizing AVRT early?
Early recognition can prevent complications and allow for prompt treatment.
What is a common age group for the onset of AVRT symptoms?
Teenagers to young adults.
