Exam 2: Waves and Measurements

The PR interval reflects all activity.

The horizontal lines on the EKG graph paper measure .

The EKG machine will produce an upright deflection on the graph paper if the flow of electricity is toward the electrode.

The deflections above and below the isoelectric line are referred to as:

A series of cardiac cycles makes up an):

Which of the following best describes the elements of a single cardiac cycle?

On EKG graph paper, the time between two heavy vertical lines is five small boxes, or sec.

A strong impulse can cause a premature abnormal discharge during the refractory period.

The PR interval begins at the first sign of the P wave and ends at the first sign of the next deflection, which is called the:

The short period of electrical inactivity between the P wave and the start of the QRS complex is called the:

When an EKG machine is turned on but not yet connected to the patient, the stylus will produce a straight line called the line.

The vertical lines on the EKG graph paper measure .

Which of the following is NOT a normal QRS measurement?

On EKG graph paper, the distance in time between two light vertical lines, or across one small square, is sec.