Ventricular Dysrhythmias Flashcards
1
Q
What is the ECG criteria and relevance for Brugada’s Sign?
A
Top of R to bottom of S interval greater than or equal to 0.1s. Likely VT (not SVT).
2
Q
What is the ECG criteria and relevance for Josephson’s Sign?
A
Small notch near bottom of S. Likely VT (not SVT).
3
Q
What is overdrive pacing?
A
To resolve VT. Electrode implanted in base of RV & stimulated at higher rate than VT until capture occurs. Rate then slowed down until SA takes over.
4
Q
What is an upsurping rhythm?
A
A rhythm that overpowers a different pacemaker (eg VT overpowers SA node).
5
Q
How does the Valsalva maneuver work?
A
.
6
Q
What are some determining factors of VT vs SVT with aberrancy?
A
Brugada’s Criteria (Concordance, Brugada’s Sign & AV Dissociation), Josephson’s Sign, Fusion & Capture beats, Hx of MI/CHF/Angina all increase likelihood of VT.
Hx of younger/SVT increases SVT.
