Scenario 4 - SVT Flashcards Preview

Year 3: Amir Sam's DPD lectures > Scenario 4 - SVT > Flashcards

Flashcards in Scenario 4 - SVT Deck (19)
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1

Recall 4 differentials for palpitations

1. Sinus tachycardia
2. SVT
3. AF
4. Ventricular tachycardia

2

Recall 2 situations where sinus tachycardia may be a physiological response in a hospital patient?

1. Sepsis
2. Hypovolaemia

3

Recall 3 possible causes of sinus tachycardia

1. Physiological response
2. Thyrotoxicosis
3. Phaeochromocytoma

4

What are the characteristic findings on ECG in SVT?

At rest: short PR/delta wave
In SVT: absent p waves

5

Recall 3 non-cardiac causes of AF

1. Any lung pathology
2. Thyrotoxicosis
3. Alcohol

6

Which type of valve disease is most likely to cause AF?

Mitral stenosis

7

Recall 3 causes of ventricular tachycardia

1. IHD
2. Electrolyte imbalance
3. Long QT syndrome

8

What are the 2 types of SVT?

AVRT; AVNRT

9

Recall the 2 possible causes of absent p waves on ECG and how to differentiate them

1. AF
2. SVT
AF is irregular, SVT is regular

10

What is the first line in management of SVT, and what should be done if this fails?

Vagal manoevres
If fails --> 6mg adenosine and then increasing doses

11

Recall 2 vagal manoevres

1. Valsalva manoevre (forced expiration against closed airway)
2. Carotid massage

12

What is always the first line of management if an arrhythmia causes haemodynamic compromise?

DC cardioversion/ defibrillation

13

How can you tell if an arrhythmia is causing haemodynamic compromise?

The patient is hypotensive

14

Differentiate the appearance of the different stages of heart block on ECG

1. Prolonged PR
2. Some p waves do not have QRS
3. AV dissociation, bradycardia and BROAD QRS

15

How does left ventricular hypertrophy appear on ECG?

Deep S in V1/2
Tall R waves in V5/6 (tall = >7 small squares)

16

If a patient is in VF and is haemodynamically stable, what should their management be?

IV amiodarone

17

What is the characteristic appearance of atrial flutter on ECG?

Sawtooth baseline

18

Recall 2 options for managing rate in AF

Digoxin
Beta blockers

19

How is rhythm managed in AF?

If <48 hours since onset: DC cardioversion
If >48 hours since onset, anti-coagulate for 3-4 weeks before DC cardioverting as a thrombus may have formed, which could cause a stroke if expelled