Imaging the left atrial appendage with intracardiac echocardiography: leveling the playing field.

Amid the boundless scientific discovery of the mid-19th century, Henry David Thoreau reflected, “The question is not what you look at, but what you see.” Scientific discovery emerges from novel perspectives on commonly observed phenomena. To truly “see” in the scientific sense, we must approach questions using the proper point of view. In this context, perspective is at least twice as important in comparative studies. To be fair and scientifically rigorous, each technique needs to be interpreted under optimal conditions.