Arrythmias Flashcards
what is brugada criteria for VT
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
Which rythym can be d/c cardioverted in an unsynched fashion
Polymorhpic VT
VF
Discuss origin of polymorphic VT
If assocaited with long QT likley torseds give mg2+
if not ishcaemic until proven otherwise
Discuss causes of acquired long QT`
electrolytes
- hypokalaemia
- hypomagnesaemia
Hypothermia
Drugs
- Class 1 and 3 antiarrhthmics
- antibiotics
- TCA
Intracranial b leeding
Heart block with bradycardia
Discuss management of torseds
MG 5-10 mmol over 10-15 minutes regardless of serum levels
-isoproterenol or rapid ventricular pacing
Describe multifocal atrial tachycardia
> 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
Discuss vagul mediated causes of bradycardia in ICU
ICP intubation suctioning urination defaecation vomiting and retching
Discuss indication for pacing
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