Conduction Abnormalities

Question 1

What is Wolff-Parkinson-White Syndrome?

Answer 1

Genetic Conduction abnormality

Abnormal conduction pathway allows a reentrant tachycardia pathway to BYPASS AV node conduction pathway

RESULTING IN SVT

Usually in people <30

Question 2

For Wolff-Parkinson-White syndrom, what does the ECG demonstrate when in sinus rhythm?

Answer 2

short PR interval and presence of a delta-wave (seen as a slow rise of the inital upstroke of the QRS)

Question 3

How do you treat Pre-excited atrial fibrillation?

Answer 3

Beta-blockers, amiodarone, or procainamide IV

NO ADENOSINE, DIGOXIN, CCBs–they can enahance retrograde conduction resulting in VFIB

Question 4

Prolongation of the QT interval may lead to torsades de pointes. What is torsades?

Answer 4

Torsades de pointes is a form of ventricular fibrillation that can lead to VFIB

Question 5

What drugs can prolong QT interval?

Answer 5

Amiodarone, Quinidine, Haloperidol, Procainamide

Question 6

What Electrolyte distrubances can cause QT interval prolongation?

Answer 6

Hypokalemia

Hyopcalcemia

Hypomagnesemia

Question 7

What is the treatment for torsades?

Answer 7

Magnesium