A mysterious condition that may be causing hundreds of people to die annually in the Australian state of Victoria

SADS, also called Sudden Arrhythmic Death Syndrome, is an "umbrella term to describe unexpected deaths in young people," usually under the age of 40

The most common SADS conditions include genetic arrhythmia syndromes such as long QT syndrome, catecholaminergic polymorphic ventricular tachycardia and Brugada syndrome

Of these, approximately 100 young people per year will have no cause found even after extensive investigations such as a full autopsy

Meanwhile, approximately 210,000 people die suddenly and unexpectedly each year due to sudden cardiac arrest in the United States

Individuals at risk of SADS are those with any first-degree relatives with unexplained cardiac death under 40 years of age, those who have suffered unexplained syncope

The best advice would be, if you yourself have had a first-degree relative - a parent, sibling, child - who’s had an unexplained death, it’s extremely recommended you see a cardiologist

Anyone else, (see a cardiologist) if you have cardiac symptoms like chest pain, shortness of breath, or you can’t keep up with friends exercising or walking, Paratz said