Left-sided congestive heart failure can be precipitated by which valve disease?

Left-sided congestive heart failure can be precipitated by which valve disease?

• A. Aortic stenosis
• B. Mitral valve disease
• C. Tricuspid regurgitation
• D. Pulmonary valve stenosis

Answer: (B)

Left-sided congestive heart failure occurs when the left heart cannot handle the volume or pressure coming from the lungs, leading to pulmonary congestion. The mitral valve sits between the left atrium and left ventricle, so disease here directly raises left atrial pressure and the pressure transmitted to the pulmonary veins. In mitral regurgitation, blood leaks back into the atrium each beat, increasing LA pressure and pulmonary venous pressure, which drives pulmonary edema. In mitral stenosis, impaired flow from the left atrium to the left ventricle also elevates LA pressure, again boosting pulmonary venous pressures and causing lung edema. Tricuspid valve disease and pulmonary valve disease affect the right heart and pulmonary circulation more, so they don’t produce left-sided failure as directly. Aortic stenosis can lead to left-sided failure too, but it does so by loading the left ventricle rather than by backing pressure into the left atrium and lungs, making mitral valve disease the most direct precipitant of left-sided congestive heart failure.

Left-sided congestive heart failure occurs when the left heart cannot handle the volume or pressure coming from the lungs, leading to pulmonary congestion. The mitral valve sits between the left atrium and left ventricle, so disease here directly raises left atrial pressure and the pressure transmitted to the pulmonary veins. In mitral regurgitation, blood leaks back into the atrium each beat, increasing LA pressure and pulmonary venous pressure, which drives pulmonary edema. In mitral stenosis, impaired flow from the left atrium to the left ventricle also elevates LA pressure, again boosting pulmonary venous pressures and causing lung edema. Tricuspid valve disease and pulmonary valve disease affect the right heart and pulmonary circulation more, so they don’t produce left-sided failure as directly. Aortic stenosis can lead to left-sided failure too, but it does so by loading the left ventricle rather than by backing pressure into the left atrium and lungs, making mitral valve disease the most direct precipitant of left-sided congestive heart failure.