Arrythmias Flashcards
Normal PR interval
160-200
If ECG shows regular longer PR interval but normal ECG
Primary heart block
Secondary heart block mobitz 1
P wave , QRS with long PR interval repeats twice
And then no QRS but directly a two successive p waves
2ndary heart block morbitz 2
Normal PR
But conduction does not go through well to ventricle so drops QRS
Tertiary heart block
PQRST and then two P waves
No conduction from SA node to AV
AV creates its own
Very bad requires pacemaker
F waves indicates
Reentry
Atrial flutter
F waves with multiples reentry until one able to send impulse
Atrial fibrillation
Small f waves
Preventricular contraction
Due to caffeine, exercise etc
Wll see PQRST and them directly a QRS
Torsades de points
Prolonged QT syndrome
Very serious
Normal heart rate
60-100 bpm
Subtypes of tachyarrythmias
Supraventricular
Ventricular
Types of Supraventricular arrhythmia
Sinus tachycardia - SA fires too fast
Focal atrial tachycardia (irritable area in atria going to AV before SA node )
Multi focal tachycardia ( multiple irritable area in atria going to AV before SA node )
Atrial fibrillation ( bunch of ectopic area
Atrial flutter ( reentrance circle )
PSTV :
ATrio ventricular nodal reentry tachycardia
AVRT
Ventricular tachyarrhythmia
Irritable area in ventricle firing potential
Ventricular tachycardia ( monophormic or polymorphic)
Polymorphic VT with prolonged QT interval ( torsades de pointe)
Ventricular fibrillation
Bradyarrythmias
Sinus bradycardia ( firing too slow)
Primary heart block ( AV node doesn’t fire well)
Secondary heart block morbitz 1
Secondary heart block morbitz 2
Third heart block
Sick sinus syndrome
Dysfunctional SA anode
Does not fire as fast so produce ventricular bradycardia
Supraventicular tachycardia to compensate
Tachybradysyndrome
,ost common causes of tachyarrythmias
Increased automaticity
Triggered activity
Reentry circuit
Most common causes of bradyarrythmias
Decrease automaticity
Conduction block
