Chronic illness in which the pulmonary arteries, the vessels that supply oxygen-carrying blood to the lungs and heart, become narrowed and unable to carry a normal amount of blood.

The recommended herbs are:

• Radix aconti lateralis preparata,
• Radix angelicae sinensis,
• Radix salviae miltiorrhizae,
• Herba agrimoniae,
• Concha ostreae, etc.