EKG conduction blocks pt 2 highlights

Question 1

Define Lown-Ganong-Levine Syndrome

Answer 1

Short PR interval without delta waves and at least 1 episode of tachyarrhythmia

Question 2

Always look at all leads for a _________________ and ____________ on the EKG of any patient who presents with a hx suggestive of a tachyarrhythmia, e.g., palpitations or syncope

Answer 2

short PR interval and delta wave

Question 3

List the criteria for WPW

Answer 3

Short PR interval <0.12 sec
Wide QRS complex (includes delta wave)
Delta wave in some leads (may only see at slower rates)

Question 4

List the 9 steps of EKG analysis

(need to know)

Answer 4

1) Heart Rate
2) Intervals – PR, QRS, & QT intervals
3) Axis
4) Rhythm – 4 questions????
Are normal P waves present/normal?
Are QRS complex narrow or wide?
What is the Relationship of P waves & QRS complexes?
Is the rhythm regular or irregular?
5) Conduction blocks
-AV blocks
-BBB or hemiblocks
6) Preexcitation
7) Enlargement and hypertrophy
8) CAD
9) Other

Question 5

Give examples of Sustained SVT with a narrow QRS complex

Answer 5

1) AVNRT
2) A flutter
3) Afib
4) MAT
5) PAT

Question 6

What is the key to diagnosing SVTs (supraventricular tachycardias)?

Answer 6

Look for Ps & Qs; most prominent in leads II and V1

Question 7

What presentation of WPW AV reciprocating tachycardia is more common?

Answer 7

Narrow QRS complex (orthodromic) – 0.10 sec or less