The test also will help your doctor find out if there are: 1  Problems with the outer lining of your heart (the pericardium). 2  Problems with the large blood vessels that enter and leave the heart. 3  Blood clots in the chambers of your heart. 4  Abnormal holes between the chambers of the heart.
Part of the Electronics glossary: An oscilloscope is a laboratory instrument commonly used to display and analyze the waveform of electronic signals. In effect, the device draws a graph of the instantaneous signal voltage as a function of time.
A technician prepares to use an oscilloscope to display an AC voltage signal. After turning the oscilloscope on and connecting the Y input probe to the signal source test points, this display appears: What appears on the oscilloscope screen is a vertical line that moves slowly from left to right.