Which two chambers share the normal pressure range of 20-30 mmHg?

Which two chambers share the normal pressure range of 20-30 mmHg?

• A. RV and PA
• B. RA and LA
• C. LV and Aorta
• D. PA and PCWP

Answer: (A)

The two chambers that share a normal pressure range around 20–30 mmHg are the right ventricle and the pulmonary artery. In a healthy heart, the right ventricle pumps into the low-resistance pulmonary circulation, so its systolic pressure closely matches the pulmonary artery systolic pressure, both typically in the 20–30 mmHg range. The other chambers have pressures outside this range: right atrial pressure is much lower (roughly 2–8 mmHg), left-sided pressures are higher (left ventricle and aorta about 100–140 mmHg systolic), and the wedge pressure (reflecting left atrial pressure) is around 6–12 mmHg. Thus, the pair that fits the 20–30 mmHg range is the right ventricle and pulmonary artery.

The two chambers that share a normal pressure range around 20–30 mmHg are the right ventricle and the pulmonary artery. In a healthy heart, the right ventricle pumps into the low-resistance pulmonary circulation, so its systolic pressure closely matches the pulmonary artery systolic pressure, both typically in the 20–30 mmHg range. The other chambers have pressures outside this range: right atrial pressure is much lower (roughly 2–8 mmHg), left-sided pressures are higher (left ventricle and aorta about 100–140 mmHg systolic), and the wedge pressure (reflecting left atrial pressure) is around 6–12 mmHg. Thus, the pair that fits the 20–30 mmHg range is the right ventricle and pulmonary artery.