ECG Flashcards

1
Q

SA node inherent discharge rate

A

60-100 times per minute
- results in 60-100 BPM

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

AV node inherent discharge rate

A

40-60 times per minute
- generates HR 40-60 BPM

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

His-Purkinje fibers node inherent discharge rate

A

30-40 times per minute
- HR of 30-40 BPM

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

automaticity

A

able to discharge/depolarize without stimulation from a nerve, as is typical in other striated muscle cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

conductivity

A

The ability to spread impulses to adjoining cells very quickly without nerve involvement

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

P wave

A

atrial depolarization

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

PR interval

A

time between signal from SA node to AV node

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Why do the purkinje fibers wrap back up the heart?

A

ventricles need to contract from the bottom up to push blood towards aorta

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

QRS complex

A

R and L ventricular depolarization

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

T wave

A

repolarization of the ventricles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Leads V1 and V2 are placed over the _________ of the heart

A

right side

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Leads V3 and V4 are located over the ________________

A

interventricular septum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Leads V5 and V6 demonstrate changes on the ___________ of the heart.

A

left side

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

saying for telemetry leads

A

White right
snow over grass
brown ground
smoke over fire

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is first degree AV block? What will be seen on the ECG?

A

the impulse is initiated in the SA node but is delayed on the way to the AV node
- The delay may be initiated in the AV node itself, and the AV conduction time is prolonged

  • long PR interval (> 0.2 sec)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

first degree AV block saying

A

If R is far from P, then you have first degree

17
Q

second degree AV block (Wenckeback)

A

Transient disturbance that occurs high in the AV junction and prevents conduction of some of the impulses through the AV node
- P wave starts normal then each subsequent one gets longer until it drops
- Drop means p wave with no signal (QRS)

  • This progressive lengthening of the P-R interval followed by a dropped QRS complex occurs in a repetitive cycle
18
Q

second degree AV block (Wenckeback) saying

A

Longer, longer, drop, then you have Wenckeback

19
Q

second degree AV block (Mobitz II) saying

A

If some p’s don’t get through, then you have Mobitz II
- p wave followed by no QRS wave

20
Q

third degree AV block

A

No impulses that are initiated above the ventricles are conducted to the ventricle
- P waves and QRS complex have no relationship

Very bad
- Ventricles are firing on their own because they are not getting p wave signal

21
Q

What HR would you expect with third degree AV block?

A

very slow HR because ventricles cannot beat that fast on their own

22
Q

third degree AV block saying

A

If Ps and Qs don’t agree, then you have 3rd degree

23
Q

Paroxysmal atrial tachycardia (PAT)/paroxysmal supraventricular tachycardia (PSVT)

A
  • sudden recurrence of atrial tachycardia
  • normal rhythm then a random run of tachycardia
24
Q

symtpoms of Paroxysmal atrial tachycardia (PAT)/paroxysmal supraventricular tachycardia (PSVT)

A
  • tachycardia
  • dizziness
  • weakness
  • SOB
25
atrial flutter ECG
sawtooth pattern - uniform due to only one ectopic focus
26
A-fib
erratic quivering or twitching of the atrial muscle caused by multiple ectopic foci in the atria that emit electrical impulses constantly
27
What does a fib have the potential for developing?
mural thrombi - clots inside the heart endothelium
28
When are PVCs considered serious?
- paired together - multifocal in origin - more frequent than 6 per minute - land directly on the T wave - present in triplets or more
29
Vtach
- 3 or more PVCs in a row - absent P waves - prolonged Q-T interval - squiggly lines
30
treatment for vtach
cardioversion or defibrillation
31
CO during vtach
severely diminished - this is a medical emergency
32
Vfib
erratic quivering of the ventricular muscle resulting in no cardiac output - multiple ectopic foci fire creating asynchrony - Start CPR
33
What lead typically sees cardiac hypertrophy?
Typically seen in V5 because it is the left side of the heart
34
What is an indication of ischemia on an ECG?
- inverted T wave - S-T segment depression
35
How many squares on an ECG = 1 sec? 6 sec?
5 big squares = 1 sec. 30 big squares = 6 sec.
36
How to calculate HR w/ normal sinus rhythm?
300 divided by the number of big boxes in between each QRS