What is the expected range for systemic vascular resistance (SVR) in normal right heart catheterization pressures?

The expected range for systemic vascular resistance (SVR) in normal right heart catheterization pressures is typically between 800-1200 dyne·s·cm^-5 (which can also be represented as mmHg), making the choice of 800-1200 mmHg the correct selection. This range reflects normal physiological conditions and indicates the resistance the left ventricle must overcome to circulate blood effectively throughout the systemic circulation.

SVR is calculated using the mean arterial pressure (MAP) and cardiac output (CO) in the formula: SVR = (MAP - CVP)/CO. As a result, monitoring SVR is crucial in evaluating patients, especially those with heart failure, shock, or other cardiovascular conditions. Values outside the normal range may suggest pathophysiologic changes, such as increased resistance due to vascular changes or decreased cardiac output.

Understanding the normal range of SVR is essential for interpreting hemodynamic status and guiding treatment in various clinical scenarios involving maternal-fetal medicine, especially when considering the cardiovascular adaptations pregnancy brings.