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Kaplan Qbank USMLE



Author16 Posts
  #1

What drugs prolong the QT interval?

___________________
The universe will yield to the will of the determined person.

  #2

quinidine, procainamide, amiodarone

  #3

and class 3 anti arrhythmics...pottash channel blockers

  #4

hello sk,
ur correct,
thanx

  #5

add to that tricyclic antidepressants, cispride, thioridazine, and believe it or not erythromycin.

So, what happens when you prolong the QT interval?

___________________
The universe will yield to the will of the determined person.

  #6

Torsades de pointes


and u correct it by:

1. Discontinue the drugs
2. give magnesium
4.shorten the AP duration by giving isoprotenalol
or electrical pacing...

  #7

well said smiling face

  #8

good discussion guys smiling face

  #9

"Quinn" wrote:
add to that tricyclic antidepressants, cispride, thioridazine, and believe it or not erythromycin


i don't think erythromycin alone will cause QT prolungation. usually it can do that in combination with another drug with that same side effect!

___________________
if you haven't any charity in your heart, you have the worst kind of heart trouble.

  #10

fluroquinolones also prolong the QT interval

  #11

I am not sure about that....maybe just never read that. Are you sure?

___________________
The universe will yield to the will of the determined person.

  #12

well..i read it 2 days back....sparfloxacin...kaplan lecture notes... :/

  #13

Thanks sk :lol:

___________________
The universe will yield to the will of the determined person.

  #14

smiling face

  #15

Why is Torsades de pointes called so?

  #16

tosade de pointes = twisting of points.. describes the appearance of the ECG as it "twists"







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