Determine the QRS axis for this ECG

image

1.Inderminate
2.+90 degrees
3.-30 degrees
4.-45 degrees
5.+150 degrees

summary:

This is an unusual right axis deviation (RAD). Lead I is negative, which usually means RAD. Lead II is the isoelectric lead, which almost always means -30 degrees; but in this example the axis is 180 degrees away from -30, or +150 degrees.