The sudden death of a young person is a devastating event for both the family and community. Over the last decade, significant advances have been made in understanding both the clinical and genetic basis of sudden cardiac death (SCD) in the young. Many of the causes of SCD in the young are due to genetic heart disorders, which can lead to both structural (e.g., hypertrophic cardiomyopathy) and arrhythmogenic (e.g. familial long QT syndrome) abnormalities. Most commonly, SCD in the young can be the first presentation of an underlying heart problem, leaving the family at a loss as to why an otherwise healthy young person has died. Not only is the tragic event for those involved, but it also presents a medical challenge to the clinician involved in the management of the surviving family members. Given the complex problem of SCD in the young, a co-ordinated multidisciplinary team approach to the investigation of such deaths is required, including expert pathology, cardiology, clinical and molecular genetic assessment, grief and genetic counselling, and involvement of patient support groups. The TRAGADY Network (Trans-Tasman Response AGAinst Sudden Death in the Young) was established in 2005, and comprises a group of highly motivated Australian and New Zealand health professionals, scientists and patient advocates who share the aim of reducing SCD in the young, principally by understanding the molecular, genetic and pathological basis of genetic heart diseases. The sudden death of a young person is a devastating event for both the family and community. Over the last decade, significant advances have been made in understanding both the clinical and genetic basis of sudden cardiac death (SCD) in the young. Many of the causes of SCD in the young are due to genetic heart disorders, which can lead to both structural (e.g., hypertrophic cardiomyopathy) and arrhythmogenic (e.g. familial long QT syndrome) abnormalities. Most commonly, SCD in the young can be the first presentation of an underlying heart problem, leaving the family at a loss as to why an otherwise healthy young person has died. Not only is the tragic event for those involved, but it also presents a medical challenge to the clinician involved in the management of the surviving family members. Given the complex problem of SCD in the young, a co-ordinated multidisciplinary team approach to the investigation of such deaths is required, including expert pathology, cardiology, clinical and molecular genetic assessment, grief and genetic counselling, and involvement of patient support groups. The TRAGADY Network (Trans-Tasman Response AGAinst Sudden Death in the Young) was established in 2005, and comprises a group of highly motivated Australian and New Zealand health professionals, scientists and patient advocates who share the aim of reducing SCD in the young, principally by understanding the molecular, genetic and pathological basis of genetic heart diseases.