ECGs

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Created by
Sumedha

Cards (19)

  • The T wave represents repolarisation of the ventricles
  • The QRS complex is the ventricular depolarisation
  • The U wave is an abnormal finding, representing delayed repolarisation of the Purkinje fibres
  • The P wave is atrial depolarisation
  • Tachycardia refers to a fast heart rate (over 100bpm)
  • The PR interval is the time between the start of the P wave to the beginning of the QRS complex
  • The ST segment is the period from the end of the QRS complex to the beginning of the T wave
  • The PR interval is the time from start of the P wave to end of the QRS complex
  • The RR interval is the time between two consecutive R waves on the ECG
  • Atrioventricular block occurs when there are delays or blocks in conduction through the AV node
  • Normal QT values must be under 500ms, but specific ranges are 350-450 for males and 350-460 for females
  • Healthy QRS complexes should be under 100 ms.
  • PR interval should be between 0.12-0.2s
  • The lateral leads of an ECG are the limb leads, I, aVL, V5, and V6.
  • The inferior leads of an ECG are II, III, and the aVF.
  • The anterior leads are V3 and V4.
  • The septal leads are V1 and V2.
  • QT interval can usually be measured through the longest interval visible in leads 2, V5, or V6.
  • QTc is measured by dividing QT by the square root of RR.