Symptoms of Eisenmenger syndrome include: 
Blue or gray skin color due to low oxygen levels (cyanosis)
Chest pain or tightness
Coughing up blood
Dizziness or fainting
Easily tiring and shortness of breath with activity
Headaches
Large, rounded fingernails or toenails (clubbing)
Numbness or tingling in fingers or toes
Shortness of breath while at rest
Skipped or racing heartbeats (palpitations)
