Normal QRS axis
Ans. (b) -30 to 110degRef: Ganong, 25th ed/p.524Normally, the QRS axis ranges from -30deg to +100degAxis more negative than -30deg is called left axis deviationAxis more positive than +100deg is called right axis deviation
+30 to 110deg
-30 to 110deg
+110deg to +150deg
- 110deg to - 150deg
Heart, Circulation, and Blood