Pediatricsadvanced
A patient with chronic rheumatic mitral regurgitation develops pulmonary congestion and later right-heart enlargement. Which mechanism best explains this progression?
Answer
Left atrial volume and pressure overload followed by pulmonary hypertension
Explanation
Mitral regurgitation returns blood to the left atrium, causing dilation and pulmonary congestion. Severe chronic disease can raise pulmonary pressure and enlarge right-sided chambers. **Key takeaway:** Left-sided valve disease can progress to right-heart consequences. **Glossary:** Pulmonary congestion: excess pressure or fluid in the pulmonary circulation.
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