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ECGs > Prolonged QT syndrome > Flashcards

Prolonged QT syndrome Flashcards

1
Q

Where is the QT interval on an ECG?

A
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2
Q

What is considered an abnormal QTc interval in men and women?

What QTc interval puts you at increased risk of Torsades de Pointes?

A

QTc >440ms in men is considered abnormal
QTc >460ms in women is considered abnormal

QTc >500ms

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3
Q

What can cause prolonged QT interval?

A

Medications
Electrolyte abnormalities
SAH
MI
Myocarditis

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4
Q

What medications can cause prolonged QT?

A

METH CATS

Methadone
Erythromycin/macrolides
Terfenadine
Haloperidol

Citalopram/SSRIs
Amiodarone
TCAs
Sotalol

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5
Q

What electrolytes abnormalities can cause prolonged QT?

A

Hypocalcemia
Hypokalaemia
Hypomagnesemia

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6
Q

What can prolonged QT lead to which you should be wary of?

A

Prolonged QT –> Torsades De Pontes (a type of VT) –> VF

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ECGs (7 decks)

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