What does a right axis deviation suggest on an ECG?

• A. Possible left ventricular hypertrophy
• B. Possible right ventricular hypertrophy or pulmonary disease
• C. Normal cardiac conduction
• D. Electrical imbalances

Answer: (B)

A right axis deviation on an electrocardiogram (ECG) typically indicates a shift in the heart's electrical impulse direction, which is often associated with certain cardiac and pulmonary conditions. More specifically, this deviation suggests the possibility of right ventricular hypertrophy, where the right ventricle becomes enlarged due to increased work from conditions such as pulmonary hypertension or chronic lung diseases.

In individuals with conditions that result in right ventricular enlargement, such as chronic obstructive pulmonary disease (COPD) or valvular heart diseases affecting the right side of the heart, the axis may shift to the right, leading to this specific finding on the ECG.

Unlike the other choices, which may relate to different cardiac conditions or normal findings, the link between right axis deviation and right ventricular hypertrophy or pulmonary disease is well-documented in clinical practice, making it the correct and most relevant interpretation of this finding on the ECG.