Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

PBCP- Pathophysiology > Pathophysiology of common arrythmias > Flashcards

Pathophysiology of common arrythmias Flashcards

1
Q

What is significant about the sinus node cells

A

Can spontaneously depolarise

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

What is the role of the AV node

A

delays conduction from the atria to ventricles

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

Features of an ECG

A 
P 
PR interval 
QRS
T
QT interval
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Why are cardiac arrhythmias brought about

A

abnormal a.p. mitiation

abnormal conductor

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

What are the extrinsic causes of bradycardia

A

normal SA node

hypothermia
Hypothyroidism
Drugs
Neurally mediated- carotid sinus syndrome + increased vagal tone

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

Intrinsic causes of bradycardia

A

Abnormal SA node

ischaemia/infarction
degeneration/fibrosis

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

What is first degree AV block

A

Prolonged PR interval >.0.2

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

What is second degree AV block

A

type 1 - 6 P waves only 5 QRS complexes ( always 1 less)

type 2- 2:1 ratio

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

What is third degree AV block

A

Complete heart block

no mathematical relationship

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

What is bundle branch block

A

QRS complex >0.10s

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

Symptoms of bradycardia

A

resulting from hypotension and decrease in cerebral blood flow

diziness
syncope
stokes-adams attacks

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

Management of bradycardia

A

Identify and treat extrinsic causes - sinus bradycardia

temp/perm pacemaker

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

What defines tachycardia

A

> 100 bpm

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

What are the stages of tachycardia

A
  1. accelerated automatically - increases the rate of depolarisation
  2. Triggered activity - after depolarisation
  3. re-entry
    - number of pathways
    - anterograde - conduction in one limb blocked
    - retrograde- conduction maintained
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What happens at sinus tachycardia

A

Normal P waves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What happens at supratrianlar tachycardia

A

p waves may be absent and palpitations and dizziness

17
Q

What are features of AF

A

decrease in cardiac output
inadequate ventricular filling
stasis of blood - risk of thromboembolism

18
Q

What is the atrial flutter

A

some organised activity

similar treatment to AF

19
Q

What is ventricular tachyarrythmias

A

Includes ventricular fibrilation

originate in ventricular tissue life threatening

20
Q

What is ventricular tachycardia and what can it lead to

A

Abnormal broad complexes

can degenerate to ventricular failure

21
Q

Treatment for ventricular tachycardia

A

Antiarrhythmic drugs

DC cardioverision

22
Q

What are examples of antiarrhythmic drugs

A

?

23
Q

What are signs of ischaemia on an ECG

A

ST segment elevation
ST depression
T wave inversion

PBCP- Pathophysiology (11 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions