Symptoms

In mitral valve stenosis, pressure that builds up in the heart is then sent back to the lungs, resulting in fluid buildup (congestion) and shortness of breath.

The condition usually progresses slowly over time. You may feel fine with mitral valve stenosis, or you may have mild symptoms for decades. Symptoms of mitral valve stenosis typically appear between the ages of 15 and 40, but they can occur at any age — even during childhood.

Signs and symptoms of mitral valve stenosis include:

• Shortness of breath, especially with activity or when you lie down
• Fatigue, especially during increased activity
• Swollen feet or legs
• Sensations of a rapid, fluttering heartbeat (palpitations)
• Chest discomfort or chest pain
• Coughing up blood
• Dizziness or fainting
• Heart murmur
• Fluid buildup in the lungs
• Irregular heart rhythms (arrhythmias)

Mitral valve stenosis symptoms may appear or worsen anytime your heart rate increases, such as during exercise. Or they may be triggered by pregnancy or other things that cause stress on the body, such as an infection.

When to see a doctor

Call your doctor for an immediate appointment if you have fatigue or shortness of breath during physical activity, heart palpitations or chest pain.

If you have been diagnosed with mitral valve stenosis but haven't had symptoms, ask your doctor about how often you should have follow-up evaluations.