Long QT Flashcards
What is the criteria for prolonged QT?
Over 440ms in men
Over 460ms in women
There will be be delayed venticular depolarisation
Which antibiotic causes long QT?
Clarithromycin
Erythromycin
Chloroquinine for malaria
Which drugs can cause QT?
Tricyclic antidepressant like amitryptilline
Anti-psychotics like haloperidol
SSRIs
Anti-arrythmias like amiodarone and fleicanaide
What heart conditions can cause long QT?
Ischaemia
Myocarditis
Mitral valve prolapse
What electrolyte chances cause long QT?
LONG because LOWW K+, CA2+ AND MG2+
What are triggers for long QT?
Subarachnoid haemorrhage
Stress or exercise
What is the congenital LQTS?
Caused by defects in the potassium channel alpha subunit
What are the types of congenital QT syndromes ?
Jervel-Lange-Nielsen syndrome where deafness due to defect in potassium
What is Romano-Ward syndrome?
Type of long QT with no deafness
Which type of SSRI is most commonly associated with long QT?
Citalopram
Which gastro drug causes long QT?
Ondansetron
What is long QT1 assoicated with?
1 for number 1 sports like Extertional syncope
What is long QT2 associated with?w
2 for IT’S 2 MUCH Emotional tress, exercise or auditory stimuli
What is long QT3 assoicated with?
Events at night
What is first line for congenital LQTS
Beta blockade
What is second line for congenital LQTS?
ICD
