Overdrive Pacing LQTS

Started by Drewmz
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Drewmz

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Why is it that overdrive pacing shortens the QT interval / Long QT Syndrome? (I'm getting that it decreases the dispersion of refractoriness and the development of early afterdepolarizations...)

Patient on amiodarone several hours before entering vtach into torsades (~ 8-12 hours before hand is discontinued using drug, so I assume still in the system since relatively long half-life?)

I'm having trouble understanding why exactly this is. If anyone can explain, or have some links to help with this, it would be greatly appreciated!
 
nstemi said:
faster hr, shorter qt
Click to expand...

Already tried that as an answer. It's apparently something to do more with the ion pathways, etc. Although inversely proportional, not the exact answer I am looking for? (This makes me sound like I know it, but I for sure don't. haha)
 
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