Final answer:
Right axis deviation (RAD) and left axis deviation (LAD) are deviations from the normal mean electrical axis in the heart's conduction system. RAD is when the current is directed more to the right side of the heart, while LAD is when the current is directed more to the left side of the heart. Causes of RAD can include right ventricular hypertrophy or chronic lung disease, while causes of LAD can include left bundle branch block or left ventricular hypertrophy.
Step-by-step explanation:
Right axis deviation (RAD) and left axis deviation (LAD) are deviations from the normal mean electrical axis in the heart's conduction system. The mean electrical axis represents the overall direction of electrical currents as they flow through the heart during the cardiac cycle. RAD is when the current is directed more to the right side of the heart, while LAD is when the current is directed more to the left side of the heart.
Causes of right axis deviation can include conditions like right ventricular hypertrophy, chronic lung disease, or conditions that cause the heart to rotate to the right. On the other hand, causes of left axis deviation can include conditions like left bundle branch block, left ventricular hypertrophy, or conditions that cause the heart to rotate to the left.