Which position can worsen respiratory status for a woman with cardiovascular disease during labor?

The supine position can worsen respiratory status for a woman with cardiovascular disease during labor due to the effect of gravity and the pressure of the uterus on the diaphragm and major blood vessels. In this position, the expanding uterus can compress the inferior vena cava, which may lead to reduced venous return to the heart and, consequently, decreased cardiac output. This can result in inadequate oxygen delivery to both the mother and the fetus, potentially exacerbating any existing cardiovascular issues.

In contrast, positions like semi-recumbent or left lateral can help alleviate pressure on the diaphragm and improve respiratory function. Standing can also promote better diaphragm movement and enhance lung expansion compared to being supine. Overall, the supine position poses significant risks for respiratory compromise in individuals with underlying cardiovascular conditions during labor.