Question to the Department of Health and Social Care:

To ask the Secretary of State for Health and Social Care, how many people are diagnosed with hypoplastic left heart syndrome as of July 2025.

The most recent data shows that there were 186 diagnoses in the year 2021, the latest year for which data is available, which resulted in 87 live births. Further information is available at the following link:

https://digital.nhs.uk/data-and-information/publications/statistical/ncardrs-congenital-anomaly-statistics-annual-data/ncardrs-congenital-anomaly-statistics-report-2021