Arrhythmias Flashcards
What are the 3 types of SVT
Atrial fibrillation
Atrial flutter
Ectopic atrial tachycardia
What are characters of AF
Atrial rate >300bpm
HR = 100-200bpm
Irregularly Irregular
NO P WAVES
What are characters of Atrial flutter
Atrial rate = 300 bpm
Irregularly irregular
Many P waves
F waves = sawtooth appearance (some missing p waves)
What are characters of ectopic atrial tachycardia
Premature beat originating anywhere other than SA node
P waves inverted in II, III & AvF
What are the 3 types of AV node arrhythmias
AV node re-entry
AV block
Accessory pathways
Characteristics of AV node re-entry
P waves immediately after QRS comples
Causes paroxysmal SVT
Cause palpitations with no cardiac abnormality
Types of AV block
1st degree
2nd degree - 2 types, Mobitz 1 & 2
3rd degree
What is 1st degree AV block
Not full AV block just slower conduction
PR interval longer than normal >0.2secs
What is 2nd degree AV block Mobitz 1
PR intervals progressively lengthen until a QRS complex is completely dropped
What is 2nd degree AV block Mobitz 2
PR intervals remain the same but P:QRS ratio is 2:1/3:1 so QRS are lost
What is 3rd degree AV block
Complete conduction block- atria and ventricles conduction abolished
Still P and QRS complex but there is NO CORRELATION
What is a bundle branch block
One bundle of his does not conduct
Two types Left & right
One ventricle action slower than the other
Seen as double waves & widened QRS
What are the types of Ventricular arrhythmias
Premature ventricular conduction
Ventricular tachycardia
Ventricular fibrillation
Asystole
What is premature ventricular contraction
broad & bizarrely shaped QRS complex followed by compensatory PAUSE
Not life threatening
Caused by 1 of 3:
Randomly
After every normal beat = bigeminy
After every 2nd normal beat = trigeminy
What is ventricular tachycardia
Rate >100bpm
Life threatening but patient can be haemodynamically stable
QRS complex are widened & have high frequency
SOB, syncope & angina
