Intro to Electrocardiogram and Intracardiac Electrograms Quiz

What is the distance between electrodes in a surface electrocardiogram?

• Two or three millimeters

• The entire heart

• One centimeter

• Five millimeters

What is the purpose of placing electrodes far from the heart in a surface electrocardiogram?

• To record only the T wave

• To record the entire heart's activity

• To record only the ventricular depolarization

• To record only the atrial activity

What is the main difference between surface and intracardiac electrogram recording?

• The type of electrodes used

• The placement of electrodes

• The size of the electrodes

• The color of the electrodes

What is the significance of the distance between electrodes in a surface electrocardiogram?

• It affects the size of the recorded signal

• It determines the color of the electrodes

• It changes the type of electrodes used

• It alters the heart rate

What is the primary focus of a unipolar electrogram recording?

• Recording from multiple electrodes

• Recording from a single electrode

• Recording from external devices

• Recording from the skin surface

What does a positive deflection in an electrogram indicate?

• Movement away from the positive recording electrode

• Movement toward the positive recording electrode

• No movement of the wavefront

• A flat recording

What happens to the polarity of the electrogram when the wavefront moves away from the electrode?

• It becomes positive

• It remains unchanged

• It becomes negative

• It becomes neutral

What happens to the recording when the wavefront is far enough away from the electrode?

• Positive deflection

• Negative deflection

• Flat or absent recording

• Increased recording

What is the significance of recording with both an anode and a cathode?

• It creates a unipolar recording

• It creates a bipolar recording

• It creates no recording

• It creates a neutral recording

What is the purpose of combining an anode and a cathode in recordings?

• To create a unipolar recording

• To create a bipolar recording

• To create no recording

• To create a neutral recording