{"id":38989,"date":"2026-01-09T09:44:35","date_gmt":"2026-01-09T09:44:35","guid":{"rendered":"https:\/\/cells4life.com\/us\/?p=38989"},"modified":"2026-04-08T15:40:46","modified_gmt":"2026-04-08T15:40:46","slug":"stem-cell-therapy-hlhs-trial","status":"publish","type":"post","link":"https:\/\/cells4life.com\/us\/2026\/01\/stem-cell-therapy-hlhs-trial\/","title":{"rendered":"Stem Cell Therapy for Congenital Heart Defect Begins Pivotal Trial Phase"},"content":{"rendered":"[et_pb_section fb_built=”1″ _builder_version=”4.16″ global_colors_info=”{}”][et_pb_row _builder_version=”4.16″ background_size=”initial” background_position=”top_left” background_repeat=”repeat” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||”][et_pb_text _builder_version=”4.27.4″ background_size=”initial” background_position=”top_left” background_repeat=”repeat” hover_enabled=”0″ global_colors_info=”{}” locked=”off” sticky_enabled=”0″]\n

A stem cell therapy for hypoplastic left heart syndrome (HLHS), a serious congenital heart defect that affects blood flow through the heart, has entered a key clinical trial stage. The therapy aims to strengthen the heart and improve outcomes for children with the condition.[1]<\/a><\/p>\n

What is HLHS?<\/h3>\n

In HLHS, the left side of the heart, which is responsible for pumping oxygenated blood through the body, does not develop properly in the womb. The left ventricle and related structures are small and underdeveloped.<\/p>\n

Before birth, a baby\u2019s circulatory system includes temporary connections between the two sides of the heart: a hole called the foramen ovale and a duct between the pulmonary artery and the aorta called the ductus arteriosus. Normally, these close shortly after birth as the baby begins breathing independently.<\/p>\n

In babies with HLHS, these temporary connections are essential for oxygenated blood to circulate. Once they close, the underdeveloped left side cannot pump blood effectively, and the right side becomes overloaded. Symptoms appear within hours or days of birth and may include a bluish tint to the skin (cyanosis), cold extremities, lethargy, weak pulse, and difficulty breathing. Without intervention, HLHS is fatal.[2]<\/a>[3]<\/a>[4]<\/a>[5]<\/a><\/p>\n

How is HLHS treated?<\/h3>\n

Babies with HLHS typically undergo a series of surgical procedures to reroute blood flow and support the single functioning ventricle. These surgeries are performed in three stages:[5]<\/a>[6]<\/a><\/p>\n