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15 Cards in this Set
- Front
- Back
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What is an ECG?
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ECG records the electrical activity in the heart
Detects the waveforms this activity creats from different views/perspectives (LEADS) |
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Why record an ECG?
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Shows the precise sequence of electrical events in cardiac cells
Allows monitoring of phases of cardiac cycle Crucial diagnostic fool: rhythm disturbances conduction disturbances myocardial ischaemia infarcation |
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How many leads are there?
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12 in total
6 chest/precordial 6 limb |
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What types of leads do you use?
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3 standard (bipolar)
3 augmented (unipolar) |
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Whose triangle do we use?
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Einthoven's triangle
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What does one lead tell you?
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Which direction the polarisation is happening
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Depolarisation towards the positive pole is shown as a ...
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upward deflection
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When the depolarisation flows perpendicular to a lead, it is shown as a ....
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biphasic (up and down) or small
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Repolarisation is shown as ...
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opposite to the depolarisation wave deflection expected
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Bipolar limb lead I measures from...
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RA (negative) - LA (positive)
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Bipolar limb lead II measures from ...
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RA (negative) - LL (positive)
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Bipolar limb lead III measures from ...
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LA (negative) - LL (positive)
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Augment lead aVR measures from ...
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centre towards RA
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Augments limb lead aVL measures from ...
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centre towards LA
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Augmented limb lead aVF measures from ...
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centre towards LL
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