An echocardiogram to see the size and shape of your heart and how well it is pumping.

But while we can estimate the size of her heart, we can't peer into it.

"My parents always told me how tall you are doesn't matter; the size of your heart defines you."

An autopsy showed that his heart was twice the size of a normal dog's heart.

The size of his heart, however, will more than make up for it.

Chest X-ray to assess the size and shape of your heart.

Such was the size of the doctor's heart.

"Maybe they're just measuring the size of your heart."

It can also convey information about the size of your heart as well.

"Because you can never look in their chest to see the size of their heart," he said.