Subvalvular aortic stenosis (SAS), often referred to as subaortic stenosis, is a rare heart disorder primarily seen in infants.
Understanding Subvalvular Aortic Stenosis (SAS)
SAS is characterized by an obstruction in the left ventricular outflow tract, the area below the aortic valve where blood exits the heart to the rest of the body. Here's a closer look:
- Location: The obstruction is typically found just below the aortic valve.
- Cause: In most cases, this obstruction is due to the presence of a membrane made of muscle tissue. This membrane restricts blood flow, forcing the heart to work harder.
Key Characteristics of SAS
| Feature | Description |
|---|---|
| Age Group | Primarily affects infants. |
| Location | Below the aortic valve in the left ventricle outflow tract. |
| Obstruction | Typically caused by a muscular membrane. |
| Impact | Restricts blood flow from the heart, leading to increased heart workload. |
Practical Insights and Considerations
- Diagnosis: Identifying SAS often involves using echocardiography to visualize the heart's structure and blood flow.
- Treatment: Treatment options vary depending on the severity of the condition and may include medications or surgery to remove the obstructive tissue.
- Rare Condition: It's important to note that SAS is considered a rare disorder in infants.
- Fixed Obstruction: The obstruction is "fixed," meaning that the blockage doesn't change in size or severity.
Why is SAS Important?
The presence of SAS can lead to serious complications if left untreated. The restricted blood flow can cause heart failure, potentially necessitating prompt intervention and treatment by experienced cardiac specialists. Early detection and management of SAS are critical to ensure positive outcomes for the affected infants.
