RMA EKG and Electrocardiography 2

Question 1

Which lead is the standard rhythm strip lead because it usually shows clear, upright P waves and QRS complexes?

Accepted Answer

Lead II

Answer

Lead II runs parallel to the heart's electrical axis, producing clear upright deflections ideal for rhythm analysis.

Question 2

On standard EKG paper, how much time does one small (1 mm) horizontal box represent?

Accepted Answer

0.04 second

Answer

At a paper speed of 25 mm/sec, each small box equals 0.04 second.

Question 3

A patient's skin is oily and the electrodes keep losing contact. What should the RMA do first?

Accepted Answer

Cleanse the site with alcohol and let it dry

Answer

Cleansing oily skin with alcohol removes residue so electrodes adhere and conduct properly.

Question 4

Which EKG artifact appears as a thick, fuzzy baseline caused by nearby electrical equipment?

Accepted Answer

60-cycle (AC) interference

Answer

60-cycle interference comes from alternating current sources and shows as a uniform fuzzy baseline.

Question 5

The chest lead V1 is correctly placed at which location?

Accepted Answer

Fourth intercostal space, right sternal border

Answer

V1 is positioned in the fourth intercostal space just to the right of the sternum.

RMA Practice Test