409 Final 10 Electrocardiography

Question 1

The isoelectric line is

Answer 1

the regular flat baseline, when there’s no activity going on

Question 2

Deflections (positive and negative) represent

Answer 2

depolarization and repolarization

Question 3

Under ___ conditions the U wave may or may not be present

Answer 3

normal

Question 4

On the ECG paper, 5 large blocks is

Answer 4

1 second

Question 5

The T wave is

Answer 5

ventricular repolarization

Question 6

If the U wave is present, it follows the

Answer 6

t wave

Question 7

Heart rhythms can be either

Answer 7

regular or irregular

Question 8

Sinus arrhythmia just means

Answer 8

HR increases and decreases slightly during breathing

Its not necessarily bad

Question 9

Sinus arrhythmia has the same characteristics as

Answer 9

NSR except that its irregular

Question 10

dysrhythmia

Answer 10

Any disorder of the heart beat

Question 11

Tachycardia is problem because it doesn’t allow enough time to fill the chambers this means

Answer 11

you have deceased CO which means decreased perfusion to the heart

Question 12

Bradycardia can be tolerated if

Answer 12

BP is maintained, but if not then you don’t have enough CO

Question 13

Dysrhythmias are classified based on

Answer 13

where they originated from

Question 14

Sinus Tachy

Answer 14

increased HR triggered by the SA

Question 15

Sinus Tachy, at first this increases CO, but

Answer 15

when it gets too fast there’s not enough time for perfusion to the heart

Question 16

Sinus Brady

Answer 16

decreased HR, caused by the SA node

Question 17

Atrial Dysrhythmias: the 3 types are

Answer 17

Premature atrial complexes
Supraventricular tachy
A Fib

Question 18

Premature Atrial Complexes

Answer 18

the atria becomes irritated and fires too early. You might not even see the P wave

Question 19

Premature Atrial Complexes: tx

Answer 19

doesn’t need tx, as long as it doesn’t evolve into something worse

Question 20

Supraventricular Tachy

Answer 20

As with Premature Atrial Complexes, the P wave isn’t there

HR could be 100 to 280

Question 21

A Fib

Answer 21

Very common
caused by fibrosis and decreased muscle
affects CO

Question 22

Several different places in the atria are firing really quickly and disorganized

Answer 22

A Fib

Question 23

How does A fib look

Answer 23

it looks like there’s no p wave, no atrial contraction, and the ventricular responses are irregular and faster

Instead of clearly contracting, the atria just quivers

Question 24

V tach

Answer 24

fast irritable firing from the ventricles

Question 25

V tach: Usually its the first sign of

Answer 25

V Fib

Question 26

V Fib

Answer 26

ventricles aren’t really contracting, just quiver

Question 27

One sign of cardiac tamponade is ___ but with

Answer 27

JVD but with clear lung sounds

Question 28

Cardiac Tamponade, the BP is decreased because

Answer 28

CO is decreased

Question 29

Causes SUDDEN drop in CO

Answer 29

tamponade