introduction to 12 leads Flashcards
what is the frequency range of diagnostic quality ECGs
0.05 Hz to 150 Hz
what is the frequency response?
a broader spectrum that allows for the 12 lead to have a better view of the cardiac electrical activity
what amount of time does the 12 lead capture for a set of 3 leads?
2.5 seconds of data
what is the frequency of monitoring quality ECGs
0.5 Hz- 20-50Hz
what does the Q wave represent?
ventricular septal depolarization
which electrode is the grounding electrode?
the right leg limb lead
what is the purpose of the right leg limb lead
it reduces distortion and artifact
what does lead 1 view in the heart?
high lateral surface of the left ventricle
what does lead 2 view in the heart
the inferior surface of the left ventricle
what does lead 3 view in the heart
also looks at the inferior surface of the left ventricle like lead 2
what does aVR look at in the heart
the atria and the great vessels
what does aVL look at in the heart
the lateral wall of the heart
what does aVF look at in the heart
inferior wall of the heart
when does axis deviation occur
occurs when the hearts electrical current takes an abnormal path
what is dextrocardia?
the heart is positioned on the right side of the chest rather than the left
