Arrythmias + ECG Findings Flashcards Preview

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Flashcards in Arrythmias + ECG Findings Deck (12)
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1
Q

3 categories of arrhythmias?

A

Sinus node abnormalities
Supraventricular arrhythmias
Ventricular arrhythmias

2
Q

Sinus node abnormalities?

A

Sinus bradycardia

Sinus tachycardia

3
Q

Main feature of sinus node abnormalities?

A

P-waves remain associated with QRS complexes confirming normal functioning of cardiac conduction

4
Q

Supraventricular arrhythmias?

A
Atrial ectopic beats
Paroxysmal tachycardias
Wolff-Parkinson-White syndrome
Atrial flutter
Atrial fibrillation
5
Q

What are paroxysmal tachycardias?

A

Narrow complexes generated below the sino-atrial node but above the ventricles

6
Q

What is Wolff-Parkinson-White syndrome?

A

A separate pathway to the atrioventricular node allows pre-excitation and re-entry

7
Q

What is atrial flutter caused by?

A

Caused by a re-entry pathway allowing rapid re-firing of the ventricles
- rate of 300/min is typical

The AVN will often block some of the beats and additional P-waves appear at a regular rate of 300/min between QRS complexes

8
Q

What is atrial fibrillation?

A

A form of supraventricular arrhythmia characterised by an irregular heart rate

9
Q

Ventricular arrhythmias?

A

Ventricular ectopic beats
Torsade de pointes
Ventricular tachycardia
Ventricular fibrillation

10
Q

What does a broad QRS complex tachycardia indicate?

A
  • Ventricular arrhythmia

- Supraventricular arrhythmia with bundle branch block

11
Q

How does AVN re-entry tachycardia occur?

A

Occurs when two pathways co-exist within the AVN

- the 2 pathways may have differing delays which, in total, present a raised heart rate of between 140-220bpm

12
Q

How are AVN re-entry tachycardias managed?

A

Adenosine or verapamil

- causes iatrogenic AVN delay