Arrythmias

Question 1

Normal PR interval

Answer 1

160-200

Question 2

If ECG shows regular longer PR interval but normal ECG

Answer 2

Primary heart block

Question 3

Secondary heart block mobitz 1

Answer 3

P wave , QRS with long PR interval repeats twice

And then no QRS but directly a two successive p waves

Question 4

2ndary heart block morbitz 2

Answer 4

Normal PR

But conduction does not go through well to ventricle so drops QRS

Question 5

Tertiary heart block

Answer 5

PQRST and then two P waves
No conduction from SA node to AV
AV creates its own
Very bad requires pacemaker

Question 6

F waves indicates

Answer 6

Reentry

Question 7

Atrial flutter

Answer 7

F waves with multiples reentry until one able to send impulse

Question 8

Atrial fibrillation

Answer 8

Small f waves

Question 9

Preventricular contraction

Answer 9

Due to caffeine, exercise etc

Wll see PQRST and them directly a QRS

Question 10

Torsades de points

Answer 10

Prolonged QT syndrome

Very serious

Question 11

Normal heart rate

Answer 11

60-100 bpm

Question 12

Subtypes of tachyarrythmias

Answer 12

Supraventricular

Ventricular

Question 13

Types of Supraventricular arrhythmia

Answer 13

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

Question 14

Ventricular tachyarrhythmia

Answer 14

Irritable area in ventricle firing potential

Ventricular tachycardia ( monophormic or polymorphic)

Polymorphic VT with prolonged QT interval ( torsades de pointe)

Ventricular fibrillation

Question 15

Bradyarrythmias

Answer 15

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

Question 16

Sick sinus syndrome

Answer 16

Dysfunctional SA anode
Does not fire as fast so produce ventricular bradycardia
Supraventicular tachycardia to compensate

Tachybradysyndrome

Question 17

,ost common causes of tachyarrythmias

Answer 17

Increased automaticity
Triggered activity
Reentry circuit

Question 18

Most common causes of bradyarrythmias

Answer 18

Decrease automaticity

Conduction block