Exam 46: Electrocardiography and Pulmonary Function Testing

The urgent care center where you work is being remodeled, and the room usually used for obtaining ECGs is currently unavailable. The ECG equipment has been moved around the corner to the room next to the X-ray room. When you begin your first patient ECG of the day, the tracing looks as shown in the figure. What problem is present and how can you fix it?

Which of the following is a record of the waves of electrical impulses responsible for the cardiac cycle?

Gillian is a cheerful, active teenager who is having an ECG as part of a physical required by her school to participate in cheerleading activities. You explain that she needs to remain very still while you record the ECG. You begin the tracing, as shown in the picture. Although Gillian remains still, when she sees the look on your face, she asks, "What's wrong?" What abnormality is visible in lead V₆, and what is your best choice of action?

Which of the following would you include in patient preparation for a pulmonary function test?

A(n) ________ is a beat that originates from the ventricles of the heart, occurs early in the cycle, and is followed by a pause before the next cycle.

You are attempting to record an ECG for Mr. Potter, a 72-year-old patient who has Parkinson's disease. Knowing this, you automatically place the limb electrodes close to the trunk. However, the tracing looks as shown in the picture. What artifact is present and what can you do to fix it?

Which of the following represents the time between contraction of the ventricles and recovery?

AC interference can be prevented by ____.

Which of the following refers to the contraction of the ventricles following depolarization?

Which precordial electrode is placed in the fourth intercostal space to the left of the sternum?

If a patient is uncomfortable lying flat on the examining table for an ECG test, he can be placed in the ____.

Which of the following is the electrical impulse that initiates a chain reaction resulting in contraction?

Electrical impulse sensors used to obtain an electrocardiogram are called ____.

The peaks and valleys of the electrical impulses responsible for the cardiac cycle are called ____.