Pulmonary valve stenosis symptoms depend on how much blood flow is blocked. Some people with mild pulmonary stenosis do not have symptoms. Those with more-severe pulmonary stenosis may first notice symptoms while exercising. Pulmonary valve stenosis symptoms may include: A whooshing sound called a heart murmur that can be heard with a stethoscope. Fatigue. Shortness of breath, especially during activity. Chest pain. Fainting.