Aortic stenosis: Difference between revisions

Revision as of 14:13, 4 December 2023

Aortic stenosis (AS) refers to narrowing of the aortic valve, resulting in increased pressure load on the left ventricle. AS is mostly a disorder of the elderly (>70 years) men, and it’s the most common valvular disease. Some also have some degree of aortic regurgitation.

Etiology

In most cases, aortic stenosis is a result of dystrophic calcification and degeneration of the aortic valve with age. 1 – 2% of the population have a congenital bicuspid aortic valve, which predisposes to aortic stenosis and causes it to occur at younger ages (<70 years).

In developing countries, rheumatic fever remains a significant cause.

Clinical features

Patients usually progress from asymptomatic to symptoms during exertion to symptoms in rest. Symptoms only occur when the stenosis is severe. The most common symptom is dyspnoea and exercise intolerance, but other symptoms include angina and syncope.

A systolic crescendo-decrescendo ejection murmur is typical. It’s best heard at the punctum maximum of the aortic valve, parasternally in the 2nd right intercostal space. It may radiate to the carotids. Soft S2 is also a typical finding.

Diagnosis and evaluation

Echocardiography allows for assessment of the narrowing of the aortic valve opening area and the pressure gradient and velocity across the valve, which is increased in case of stenosis. Coronary angiography can be used to assess the degree of coronary artery disease.

A chest radiograph may show enlarged left border of the heart and dilation of the ascending aorta.

Treatment

In mild cases, regular follow-up alone might be sufficient, but the only definitive treatment is valvular replacement. This can be achieved by open surgery (surgical aortic valve replacement, SAVR) or transcatheter replacement (transcatheter aortic valve replacement, TAVR). If significant CAD is present, coronary bypass can be performed in the same setting as the surgical replacement of the valve.

Complications

Left ventricular hypertrophy -> heart failure
Sudden cardiac death

@@ Line 1: / Line 1: @@
-'''Aortic stenosis''' (AS) refers to narrowing of the aortic valve, resulting in increased pressure load on the left ventricle. AS is mostly a disorder of the elderly (>70 years) men, and it’s the most common [[Valvular heart disease|valvular disease]]. Some also have some degree of [[aortic regurgitation]].
+<section begin="radiology" />'''Aortic stenosis''' (AS) refers to narrowing of the aortic valve, resulting in increased pressure load on the left ventricle. AS is mostly a disorder of the elderly (>70 years) men, and it’s the most common [[Valvular heart disease|valvular disease]]. Some also have some degree of [[aortic regurgitation]].<section end="radiology" />
 == Etiology ==
@@ Line 10: / Line 10: @@
 A systolic crescendo-decrescendo ejection murmur is typical. It’s best heard at the punctum maximum of the aortic valve, parasternally in the 2nd right intercostal space. It may radiate to the carotids. Soft S2 is also a typical finding.
+<section begin="radiology" />
 == Diagnosis and evaluation ==
-[[Echocardiography]] allows for assessment of the aortic valve opening area and the pressure gradient and velocity across the valve, which is increased in case of stenosis. [[Coronary angiography]] can be used to assess the degree of [[coronary artery disease]].
+[[Echocardiography]] allows for assessment of the narrowing of the aortic valve opening area and the pressure gradient and velocity across the valve, which is increased in case of stenosis. [[Coronary angiography]] can be used to assess the degree of [[coronary artery disease]].
+A chest radiograph may show enlarged left border of the heart and dilation of the ascending aorta.
+<section end="radiology" />
 == Treatment ==
 In mild cases, regular follow-up alone might be sufficient, but the only definitive treatment is valvular replacement. This can be achieved by open surgery (surgical aortic valve replacement, SAVR) or transcatheter replacement (transcatheter aortic valve replacement, TAVR). If significant [[Coronary artery disease|CAD]] is present, [[coronary bypass]] can be performed in the same setting as the surgical replacement of the valve.