Heart Blocks Flashcards
Describe a PRIMARY Heart block
PR interval >200ms
Every P followed by QRS
How does a patient present with primary heart block
Asyptomatic
What can cause a Primary heart block
Drugs can block AVN Conduction
- BB
- CCB
- Digoxin
Describe a Mobitz 1 heart block
PR Progressive elongates w/Dropped QRS
What can cause Mobitz 1 Heart block
Drugs (BB,CCB and digoxin block AVN conduction)
Inferior MI
How can a symptomatic patient with Mobitz 1 be treated
Pacemaker
Describe Mobitz 2 heart blcok
PR Consistently long (Not PROLONGATING) w/ random QRS dip
What can cause Mobitz 2 heart block
Drugs blocking AVN Conduction
Inferior MI
Rheumatic fever
How does a patient with Mobitz 2 present
SOB
Chest pain
Syncope
How is Mobitz 2 treated
Pacemaker
Describe a Tertiary Heart blcok
AV Dissociation
-Atria and Ventricles beat independantly
What sustains a heart beat in tertiary Heart block
Ventricular Escape rhythm
-AVN takes over if SAN fails
What can cause tertiary heart block
MI
HTN
Structural heart disease
How is Tertiary Heart block treated
IV Atropine and Pacemaker
