Cardiac

A hole in the wall of the heart separating the atria or in the wall of the heart separating the ventricles.

Impulses traveling through the heart’s upper chambers (the atria) are delayed in the area between the upper and lower chambers (the AV node) and fail to make the ventricles beat at the right moment

A round aneurysm that bulges out from an artery; involves only part of the circumference (outside wall) of the artery.