ECG:the first step

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summary

Cardiac vector loop during ventricular depolarization
Condition of the Heart the direction the loop mainly spreads projection to leads
(*the most diagnostic lead)
Actual ECG recordings
normal Left-inferior-posterior I aVF V2 I aVF V2 all leads
left ventricular hypertrophy left-left-inferior-posterior *I - - I - - all leads
Inferior myocardial infarction left-superior-posterior - *aVF - - aVF - all leads

Acheivement Quiz

  1. The direction and polarity of lead is left - , right - . The QRS wave in the above-selected lead in this ECG mainly shows . The QRS wave is formed when the cardiac vector loop during is projected to a lead. And, the cardiac vector loop spreads to the area with electrical activity of the ventricle, which is to the area the ventricle is relatively . Thus, in the present ECG, the area the ventricle is thick, is on the side. And, the ventricle hypertrophic. As the conclusion, the most likely diagnosis in the present ECG is .
  2. The direction and polarity of lead is superior - , inferior - . The QRS wave in the above-selected lead in this ECG mainly shows . The QRS wave is formed when the cardiac vector loop during is projected to a lead. And, the cardiac vector loop spreads to the area with electrical activity of the ventricle, which is to the area the ventricle is relatively . Thus, in the present ECG, the area the ventricle is thick, is on the side. As the conclusion, the most likely diagnosis in the present ECG is .
  3. The direction and polarity of lead is nearly anterior - , nearly posterior - . The QRS wave in the above-selected lead in this ECG mainly shows . The QRS wave is formed when the cardiac vector loop during is projected to a lead. And, the cardiac vector loop spreads to the area with electrical activity of the ventricle, which is to the area the ventricle is relatively . Thus, in the present ECG, the area the ventricle is thick, is on the side. As the conclusion, the most likely diagnosis in the present ECG is .
  4. The direction and polarity of lead is left - , right - . The QRS wave in the above-selected lead in this ECG mainly shows . The QRS wave is formed when the cardiac vector loop during is projected to a lead. And, the cardiac vector loop spreads to the area with electrical activity of the ventricle, which is to the area the ventricle is relatively . Thus, in the present ECG, the area the ventricle is thick, is on the side. And, the ventricle hypertrophic. As the conclusion, the most likely diagnosis in the present ECG is .
  5. In this ECG, the most likely diagnosis is .
  6. In this ECG, the most likely diagnosis is .
  7. In this ECG, the most likely diagnosis is .

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