Why does pericardial effusion cause decreased pulse pressure?
Disease description:
My pericardial effusion has gradually increased, and I've developed a decreased pulse pressure. I'd like to know why pericardial effusion causes reduced pulse pressure?
Doctor's answer (1)
Dr. Zhang Jianbin
After the onset of the disease, patients generally experience a gradual decrease in pulse pressure, typically due to fluid accumulation within the body that impairs cardiac expansion and venous return, leading to congestion in both systemic and pulmonary circulation. The pressure from the accumulated fluid may restrict the heart's relaxation function, resulting in reduced blood flow, decreased ejection volume, and lower systolic pressure. This diminishes the blood return capacity, thereby reducing cardiac output and narrowing the pulse pressure difference.
