Final answer:
A possible etiology for pericardial effusion is chronic MRD (mitral regurgitation). Pericardial effusion refers to the abnormal accumulation of fluid in the pericardial cavity, the sac surrounding the heart. Chronic MRD occurs when the mitral valve in the heart does not properly close.
Step-by-step explanation:
A possible etiology for pericardial effusion is chronic MRD (mitral regurgitation).
Pericardial effusion refers to the abnormal accumulation of fluid in the pericardial cavity, the sac surrounding the heart. It can be caused by various underlying conditions, including diseases affecting the heart valves.
Chronic MRD, or mitral regurgitation, occurs when the mitral valve in the heart does not properly close, leading to a backward flow of blood from the left ventricle to the left atrium. This can result in increased pressure within the heart and ultimately lead to pericardial effusion.