Pre excitation and SVT Flashcards
Lance Carter, C-AA (UMKC)
What are the possible electrical pathways to the ventricles from the SA node?
What is the alpha pathway?
What is a beta pathway? How many are there?
What are beta pathways also known as?
What are possible triggers that can activate beta pathways?
What are the Electrical Properties Of The Alpha (Normal) Pathway?
Electrical Properties Of The Beta (Abnormal) Pathways?
What happens when preexcitation occurs with tachycardia?
Short
Normal
The conduction still travels down the normal Purkinje system
What is the accessory pathway for Wolff Parkinson White (WPW) called?
What will the Wolff Parkinson White ECG look like?
Patients that have Wolff Parkinson White & Tachycardia, anesthetists should avoid what?
What are treatment options for WPW?
- Transvenous catheter ablation
- Antiarrhythmic drugs (beta blockers, amiodarone)
- Synchronized cardioversion if the patient is unstable
Why should in Wolff Parkinson White, providers should avoid antiarrhythmic drugs that block conduction through the AV node?
What is the accessory pathway in Lown Ganong Levine (LGL) Syndrome called?
Lown Ganong Levine (LGL) Syndrome ECG
What symptoms does a patient with Lown Ganong Levine (LGL) Syndrome have?
What are the accessory pathways in Mahaim Preexcitation called?
What will the ECG show in a Mahaim Preexcitation?
Preexcitation Summary
What is Supraventricular Tachycardia (SVT)?
ECG Identification Of SVT
What are Symptoms Of SVT, and how quickly should you treat it?
What is “Paroxysmal” SVT?
Question:
Question: PAC
- If a PACoccurs, the impulse travels ANTEGRADE through the slow alpha pathway only
‒(because the accessory pathway from the previous beat is still refractory) - The accessory pathway will then repolarize while the impulse is traveling down the AV node
- The impulse travels RETROGRADE through the fast accessory pathway
‒(because the accessory pathway has repolarized at this point) - Theimpulse is able to travel ANTEGRADE down slow the alpha pathway again
‒(because the short refractory period of the alpha pathway is short)
What happens to the ECG when reentry occurs within the AV node only during SVT after a PAC?
SVT Within The AV Node?
Treating SVT Within The AV Node (AVNRT)
When is a Vagal Maneuver (Carotid Massage) contraindicated?
Vagal Maneuver (Cold Stimulus)
Pharmacology and dose of adenosine?
Pharmacology and dose of Sotalol?
Treatment Summary For SVT Within The AV Node
SVT Within The Myocardium
Is AVRT the same thing as Wolff Parkinson White?
Treatment For SVT Within The Myocardium
Avoiding AV Node Blockers In AVRT: Why?
Treatment Summary For SVT
Options for Left Atrial Appendage (LAA) Closure
