Pulmonary hypertension is a relatively common disease in daily life. Many patients, when they go to the hospital for examination, often see reports from cardiac ultrasound indicating mild pulmonary hypertension, moderate pulmonary hypertension, or non-severe pulmonary hypertension. So, what are the criteria for mild pulmonary hypertension? Generally, pulmonary artery pressure is measured using right heart catheterization or cardiac ultrasound. If the pressure is between 30 to 50 mmHg, this is often considered mild pulmonary hypertension. Generally, the prognosis for mild pulmonary hypertension is quite good, typically not producing noticeable symptoms or affecting health.