Maple Leaf goaltending prospect Jonas Gustavsson will be sidelined a few days after undergoing an ablation today.
The small operation is required when electricity flowing through the heart to aid muscle contractions is blocked or travels the same pathway.
Gustavsson had been undergoing tests after he felt dizzy during club medicals on Friday when going full throttle on a stationary bike.
"We're lucky it happened when he was put under stress, because a lot of times, you can't duplicate the situation when his heart was racing," coach Ron Wilson said.
"It's fairly common. Our doctors say they will do 10 NHL players in a summer. It has nothing to do with his heart, it's a little incision they make in your groin area (one of the heart's pathways). But it has to heal up and you don't want an infection, by him putting his gear on. He'll be ready to go on the weekend."
Usually, ablation is a non-invasive procedure that involves inserting wire-like catheters into a blood vessel. The problem had not not been detected previous to the 24-year-old signing with the Leafs after leading the Swedish Elite League last season with a 1.96 average.
Wilson had not planned on debuting Gustavsson tomorrow at the ACC in the first of four exhibition games, preferring to use the rookie in a less pressure-filled road contest. Joey MacDonald will likely get more work behind Vesa Toskala until Gustavsson recovers.