Sinus of Valsalva aneurysm

Last revised by Yaïr Glick on 30 May 2022

A sinus of Valsalva aneurysm refers to abnormal dilatation of the sinus of valsalva and is a cause of thoracic aortic dilatation. Sinus of Valsalva aneurysms arise from one of the aortic sinuses. They are either congenital or acquired.

There is a male predilection (M:F ratio being around 3-4:1). They are relatively more common in eastern and Asian populations and can occur in any age group with a mean age of 35 years at presentation 4.

Commonly occur with other congenital heart anomalies, including:

They may be asymptomatic. Presentation with a catastrophic acute rupture is quite common. Dyspnea, chest pain, palpitations, and cardiac murmurs may occur 4.

Sinus of Valsalva aneurysm may be either congenital or acquired. Congenital causes include:

Acquired causes include:

They most often involves the right coronary sinus, less frequently the non-coronary sinus, and rarely left coronary sinus 3.

They are saccular and arise above the aortic annulus.

MRI is considered the imaging modality of choice, especially with the mycotic type. The saccular aneurysm is seen arising from one of the sinuses (right coronary sinus being the most common location) and protruding into an adjacent cardiac chamber. 

The normal sinus diameter upper limit is usually taken as 40 mm (with some publications suggesting 36 mm for females) 6.

Transesophageal echocardiography is preferred for anatomical delineation of the origin of the aneurysm, which will appear on two-dimensional imaging as a mobile, thin walled structure, circular in the short axis, protruding from above the plane of the coronary artery origins into an adjacent cardiac chamber. The appearance is classically described as a "windsock" deformity with enlargement during systole 8.

Filling of the aneurysm may be observed with color flow Doppler, and the use of contrast may aid in the visualization of the left-to-right shunt, as well as differentiating between ruptured and unruptured aneurysms 9. The use of spectral Doppler allows quantification of flow velocity and direction; rupture into a cardiac chamber with subsequent shunting typically yields constant flow from the aorta to the lower pressure chamber throughout the cardiac cycle, potentially allowing differentiation from other intracardiac shunts, e.g. ventricular septal defects 10.

Surgical repair with a Bentall procedure can be performed.

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Cases and figures

  • Case 1: right coronary sinus
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  • Case 2: ruptured
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  • Case 3: with thrombus
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