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Published on: October 16, 2021
Non-rheumatic annular mitral stenosis: prevalence and characteristics
Mohammad Raza Akram1, Tze Chan, Susan McAuliffe
1Department of Cardiology, Royal Liverpool University Hospital, Prescott Street, Liverpool L7 8XP, UK.
Summary
Non-rheumatic annular mitral stenosis (AMS) is more common than previously thought, affecting 18.5% of patients. This condition is linked to coronary artery disease risk factors and may require different measurement methods than rheumatic mitral stenosis.
Area of Science:
- Cardiology
- Echocardiography
- Valvular Heart Disease
Background:
- Rheumatic mitral stenosis (RMS) is a common cause of mitral stenosis.
- Non-rheumatic annular mitral stenosis (AMS) is less understood.
- Defining AMS prevalence and characteristics is crucial for diagnosis and management.
Purpose of the Study:
- To determine the prevalence and characteristics of non-rheumatic annular mitral stenosis (AMS).
- To compare AMS with rheumatic mitral stenosis (RMS) in a general population.
- To identify risk factors associated with AMS.
Main Methods:
- Seventy patients with mitral stenosis were assessed using clinical and echocardiographical variables.
- Patients with AMS and RMS were age- and gender-matched for comparison.
- Key echocardiographic parameters including mitral valve area (MVA) and pressure half-time (PHT) were analyzed.
Main Results:
- Non-rheumatic annular mitral stenosis (AMS) was identified in 18.5% of patients.
- AMS patients exhibited higher prevalence of arterial hypertension and hypercholesterolemia.
- Higher mitral annulus calcification severity scores and left ventricular mass were observed in AMS patients.
Conclusions:
- Non-rheumatic annular mitral stenosis (AMS) is more frequent than previously assumed.
- AMS is associated with risk factors for coronary artery disease.
- Pressure half-time (PHT) may be less accurate for MVA calculation in AMS compared to RMS.
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