Patho Chp 28

What are the 2 types of disorders of the cardiac conduction system

disorders of rhythm

disorders of impulse conduction

What are the 4 causes

congenital defects or degenerative changes in the conduction system

myocardial ischemia and infarction

fluid and electrolyte imbalances

effects of drug ingestion

This photo is an example of what type of sinus node arrhythmias

Sinus bradycardia

This type of sinus node arrhythmias has fewer than 60 beats per minute

Sinus bradycardia

This photo is an example of what type of sinus node arrhythmias

Sinus tachycardia

This type of sinus node arrhythmias has more than 100 beats per minute

Sinus tachycardia

This photo is an example of what type of sinus node arrhythmias

Sinus arrest

This photo is an example of what type of arrhythmias

Atrial fibrillation

This type of arrhythmias is the most common

Atrial fibrillation

Twisting of points

torsade de pointes

This refers to a large bizarre polymorphic QRS complex that vary in amplitude and direction

torsade de pointes

How can you get torsade de pointes (2)

congenital: membrane ion channel

acquired: cocaine (MI, electrolyte imbalance, HIV)

This photo is an example of

torsade de pointes

This is an absence of P waves

ventricular tachycardia

This photo is an example of

ventricular tachycardia

This represents severe derangements of cardiac rhythm that terminate fatally within minutes

ventricular flutter

This photo is an example of

ventricular flutter

This ventricles quivers but does not contract

ventricular fibrillation

This photo is an example of

ventricular fibrillation

What are the 3 disorders of atrioventricular conduction?

First degree AV block

Second degree AV block

Third degree AV block

What are the 2 types of second degree of AV block

Type I (Wenckebach or Mobitz)

Type II (Mobitz type 2)