Basic EKG Tracing

Question 1

(1) Right arm - anywhere between wrist and shoulder.
(2) Left arm - anywhere between wrist and shoulder.
(3) Right leg - anywhere between ankle and torso.
(4) Left leg - anywhere between ankle and torso.
(5) V1 - 4th ICS to the right of the sternum.
(6) V2 - 4th ICS to the left of the sternum.
(7) V3 - Midway between V2 and V4.
(8) V4 - 5th ICS at the midclavicular line.
(9) V5 - Anterior axillary line at the same level as V4.
(10) V6 - Midaxillary line at the same level as V4 and V5.

Answer 1

Placement of EKG leads for 12 lead:

Question 2

the first deflection prior to the QRS complex is the __-wave. It represents depolarization of the right and left atrium.

Answer 2

P wave

Question 3

is the time between the start of the P wave and the start of the QRS complex. Normal PR interval is
0.12-0.2 seconds.

Answer 3

PR interval

Question 4

This represents depolarization of the
ventricles. Normal QRS duration is less than
0.12 seconds.

Answer 4

QRS complex

Question 5

This wave it follows the QRS complex. It represents the repolarization of the ventricles.

Answer 5

T-wave

Question 6

What interval starts at the QRS complex and ends at the end of the Twave.
It represents the time of ventricular activity including both
depolarization and repolarization. Normal interval 0.36-0.44 seconds.

Answer 6

QT interval

Question 7

What segment between the end of the QRS complex and the start of the T-wave

It should be at the same level on the EKG tracing as the PR interval.

Answer 7

ST Segments

Question 8

What wave represents the start of myocardial ischemia.

Answer 8

ST Depression

Question 9

What wave represents full thickness myocardial infarction.

Tissue Death -STEMI

Answer 9

ST segment elevated and stays elevated

Question 10

Normally are upright except in V1

Answer 10

T waves

Question 11

This wave could represent ischemia and should be of
concern.

Answer 11

T wave inversion

Question 12

represents the lateral aspect of the heart and
receives blood from the LCx.

Answer 12

Leads I, aVL, V5-V6

Question 13

represents the inferior aspect of the heart and receives blood from the RCA.

Answer 13

Leads II, III, aVF

Question 14

represents the septal area of the heart and receives blood from the Left Anterior Descending Artery (LAD)

Answer 14

Leads V1-V2

Question 15

represents the anterior area of the heart (in particular the LV) and receives blood from the LAD.

Answer 15

Leads V3-4