Below is a partial transcript, edited lightly for clarityLance Visser, DVM, MS, DACVIM (Cardiology): Assessing heart size, I think, should definitely involve measurements. But the main ones with the most literature behind them are the kind of good, old vertebral heart size. And it's not that vertebral heart size is worse, at least in this context. They're VHS, or vertebral heart size is kind of that length and width measurement. And vertebral left atrial size is really just measuring the width of the left atrium radiographically.