Which range represents a normal transmitral E/A ratio in adults?

Which range represents a normal transmitral E/A ratio in adults?

• A. 0.2–0.5
• B. 0.8–2.0
• C. 2.0–3.0
• D. 3.0–4.0

Answer: (B)

Transmitter mitral E/A ratio measures the balance between early, passive filling (E) and late filling from atrial contraction (A) during diastole. In a normally functioning adult ventricle, early filling dominates, so E is larger than A and the ratio sits around 1, with typical reference values spanning about 0.8 to 2.0. This range accommodates the natural variation with age and individual hemodynamics. Values below 0.8 suggest impaired relaxation, while values above about 2.0 indicate a more restrictive filling pattern with higher atrial pressures. Therefore, 0.8–2.0 is the normal range.

Transmitter mitral E/A ratio measures the balance between early, passive filling (E) and late filling from atrial contraction (A) during diastole. In a normally functioning adult ventricle, early filling dominates, so E is larger than A and the ratio sits around 1, with typical reference values spanning about 0.8 to 2.0. This range accommodates the natural variation with age and individual hemodynamics. Values below 0.8 suggest impaired relaxation, while values above about 2.0 indicate a more restrictive filling pattern with higher atrial pressures. Therefore, 0.8–2.0 is the normal range.