Inferior myocardial infarction

ECG: the first step

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Inferior myocardial infarction

The "cardiac vector loop during ventricular depolarization" in patients with inferior myocardial infarction mainly spreads superiorly, which makes the negative deflection of the QRS wave (the Q wave) the main deflection in lead aVF.

Let's compare inferior myocardial infarction with the normal heart.

  "cardiac vector loop during ventricular depolarization" Actual ECG record
Condition of the heart The direction the loop
mainly spreads
Projection to leads
(*the most diagnostic lead)
Inferior myocardial
infarction
left-superior-posterior *aVF aVF All leads

Achievement Quiz

  1. In inferior myocardial infarction, the cardiac vector loop during ventricular depolarization mainly spreads in superior-inferior direction.
  2. In a normal person,the deflection of Lead aVF is mainly , but in the patient of inferior myocaridial infarction, the deflection of Lead aVF is mainly .
  3. In this ECG, the most likely diagnosis is
  4. In this ECG, the most likely diagnosis is