Given those figures, Dr. Connors realized nothing would be lost by implanting ICDs in asymptomatic patients with ARVD5 to maintain normal heart rhythms.

Earlier this year his team reviewed the data of the prevention program which they started in 1999. They concluded that implanted defibrillator treatment for primary prevention in both sexes, and secondary prevention in males significantly improves survival.

According to Heart and Stroke Foundation spokesperson Dr. Beth Abramson, there are as many as 40,000 sudden cardiac arrests every year in Canada.

"What's fascinating about this study is that they show that preventive intervention works," says Dr. Abramson. "This treatment is not only prolonging lives; it's giving families peace of mind and hope for the future."

She also notes, "This is exciting information for physicians working with these rare cases but is also important to remember that the most common causes of heart disease relate to lifestyle. It is important that all of us, regardless of family history, take care of our hearts: basic things like smoking cessation, following a healthy diet, and physical activity go a long way in protecting our health."

Source: Heart and Stroke Foundation of Canada