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Toxic > EKG tidbits > Flashcards

EKG tidbits Flashcards

1
Q

What effect does cocaine have on cardiac conduction?

A

Na channel blocker, so causes QRSd widening

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2
Q

How does sodium bicarb treat QRS widening?

A
  • Increases TCA protein bindings (helps remove drug from the Na+ channel)
  • Increased extracellular Na may overcome block
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3
Q

What two electrolyte abnormalities can prolong the QT interval?

A

Decreased Mg

Decreased Ca

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4
Q

What is the normal QTc for men and women respectively?

A 
Men = 430-450
Women = 450-470
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Toxic (12 decks)

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