11.03.2017 Views

DR Medhat MRCP

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QRS Deflection<br />

Inferior leads<br />

(II,III,aVF)[express RV]<br />

Axis of the heart<br />

Lateral leads<br />

(I,aVL)[express LV]<br />

Axis<br />

Positive Positive Normal axis<br />

Positive Negative Right axis deviation<br />

Negative Positive Left axis deviation<br />

Negative Negative Extreme RAD or LAD<br />

Normal axis Right axis deviation Left axis deviation<br />

Mean axis > +105 0 Mean axis lies () -30 0 & -90 0<br />

1) Left posterior hemiblock<br />

1) Left anterior hemiblock<br />

2) Right ventricular hypertrophy. 2) LBBB.<br />

3) Type A WPW (Lt accessory pathway) 3) Type B WPW (Rt accessory pathway)<br />

4) Osteum secondun ASD<br />

4) Ostium premium ASD,TS<br />

5) Tall persons & infants < 1 year. 5) Obesity<br />

6) PE, Chronic lung disease<br />

6) Hyperkalemia<br />

40

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