Arrythmias Flashcards

1
Q

what is brugada criteria for VT

A

1) RS pattern present
2) RS >100ms
3) capture or fusion beats or dissocaiton of p and QRS
4) nil evidence of RBBB or LBBB

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2
Q

Which rythym can be d/c cardioverted in an unsynched fashion

A

Polymorhpic VT

VF

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3
Q

Discuss origin of polymorphic VT

A

If assocaited with long QT likley torseds give mg2+

if not ishcaemic until proven otherwise

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4
Q

Discuss causes of acquired long QT`

A

electrolytes

  • hypokalaemia
  • hypomagnesaemia

Hypothermia

Drugs

  • Class 1 and 3 antiarrhthmics
  • antibiotics
  • TCA

Intracranial b leeding

Heart block with bradycardia

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5
Q

Discuss management of torseds

A

MG 5-10 mmol over 10-15 minutes regardless of serum levels

-isoproterenol or rapid ventricular pacing

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6
Q

Describe multifocal atrial tachycardia

A

> 3 distince morphologically non sinus p waves
atrial rates of 100-130 bpm
variable AV block

Commonly associated with respiraotry disease and CCF

Exacerbated by

  • digoxin or theophylline
  • hypokalaemia, hypomagnesaemia, hyponatremia

Dose not respond to D/C cardioversion
treat preceipitants
Can use B blocker or verapamil for rate control

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7
Q

Discuss vagul mediated causes of bradycardia in ICU

A
ICP 
intubation 
suctioning 
urination
defaecation
vomiting and retching
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8
Q

Discuss indication for pacing

A

Sinus bradycardia with symtpoms unresponsive to drug therapy
mobitz type 2
3rd degree
bilateral BBB

As transcutaneous pacing is uncomfortable
transvenous is preferred for long term pacing

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