<![CDATA[Congenital heart disease (CHD) is among the most prevalent structural birth defects, affecting approximately 8–9 per 1,000 live births globally. In Indonesia, delayed diagnosis remains a critical challenge due to limited parental awareness and inadequate knowledge of early CHD warning signs. Early recognition by mothers and primary caregivers is essential to improve referral rates and clinical outcomes. This community service program aimed to improve the knowledge of mothers regarding early detection of CHD in children through structured health education. A pre-experimental study using a one-group pretest–posttest design was conducted at Kelurahan Talang Putri Palembang city, in February 14th 2026. A total of 18 mothers of children aged 0–5 years participated. Educational interventions included a structured lecture, visual poster media, and physical examination demonstration by a pediatric specialist. Knowledge was assessed using a validated 10-item questionnaire administered before and after the intervention. Data were analyzed descriptively using mean scores, score differences, and percentage of improvement. total of 18 participants completed both pretest and posttest. The mean pretest score was 70.6, while the mean posttest score increased to 87.8. The mean score improvement was 17.2 points, corresponding to a 24.4% increase from baseline. Fourteen participants showed improved scores, four participants maintained the same scores, and no participant experienced a decrease. Health education using a multimodal approach—combining lectures, visual media, and clinical demonstration—effectively increased maternal knowledge of early CHD detection. Integration of such programs into primary healthcare facilities is recommended to support early identification and timely referral of children with CHD.]]>
