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Normal ECG - PowerPoint PPT Presentation


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Normal ECG. A 55 year old man with 4 hours of "crushing" chest pain. A 63 year old woman with 10 hours of chest pain and sweating. A 60 year old woman with 3 hours of chest pain. A 53 year old man with Ischaemic Heart Disease. A 79 year old man with 5 hours of chest pain.

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slide24
QTc

Normal QTc

  • Men < 0.43
    • borderline o.43-0.45
    • prolonged >0.45
  • Women < 0.43
    • borderline o.43-0.47
    • prolonged >0.47
wolf parkinson white syndrome
Wolf-Parkinson-White syndrome
  • short PR interval, less than 3 small squares (120 ms)
  • slurred upstroke to the QRS indicating pre-excitation (delta wave)
  • broad QRS
  • secondary ST and T wave changes
      • Localising the accessory pathway
  • An accessory pathway, bundle of Kent, exists between atria and ventricles and causes
  • early depolarisation of the ventricle. The location of the pathway may be deduced as follows:-
  • LOCATION V1 V2 QRS axis
  • left posteroseptal (type A) +ve +ve left
  • right lateral (type B) -ve -ve left
  • left lateral (type C) +ve +ve inferior (90 degrees)
  • right posteroseptal -ve -ve left
  • anteroseptal -ve -ve normal
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