Aortic stenosis is a disorder of the heart valve in which the opening of the aortic semi-lunar valve becomes narrowed. Which effect could aortic stenosis have on the structure and function of the heart?
- AThe tendons of the heart valves are weakened by blood being forced back through the bicuspid/left atrio-ventricular valve into the left atrium.
- BThe cardiac muscle of the left ventricle wall is thinned by blood leaking out of the left ventricle during ventricular diastole.
- CThere is less cardiac muscle in the left ventricle and reduced diastolic blood pressure, caused by the smaller blood volume entering the left atrium.
- DThe wall of the left ventricle thickens, leading to an enlarged heart and inability to relax and fill completely during diastole.