If you find the material on this website useful, you will find that the two books ACES for PACES and KEYS to SUCCESS in Medicine complement the material on these sites and will enhance your studying and revision

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ACES for PACES

Medical Revision

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Web ydr.org.uk acesforpaces.com medicalrevision.org

BOF: 28

A middle aged male is brought into casualty by the police. He had been found lying in the snow.

On examination he was hypothermic, unconscious and had a bradycardia.

An ECG was performed

Which one of the following is pathognomonic of hypothermia?

a)   Atrial fibrillation

b)   J waves

c)    Prolongation of the PR interval

d)   Widening of the QRS complex

e)   QT prolongation

Answer :b)

J waves

These are rounded (dome like) deflections that occur just after the QRS complex

ü  Pathognomonic of hypothermia

Also occur in

E&M

ü  Hypercalcaemia

CNS

ü  Brain injury

ü  Subarachnoid haemorrhage

ü  Cardiopulmonary arrest from over sedation

CVS

ü  Brugada syndrome

ü  Vasospastic angina

ü  Idiopathic ventricular fibrillation

Other ECG changes in hypothermia

ü  Atrial fibrillation

ü  Prolonged PR interval

ü  QRS widening

ü  QT elongation

Revision Tip

Revise causes of hypothermia ACES for PACES page 71

 

 

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