Cardiac Dysrhythmias

Question 1

Cardiac Dysrhythmias
Causes
Enhanced Automaticity

Answer 1

MI, drugs, toxins, lyte imbalances

Question 2

Cardiac Dysrhythmias
Causes
Triggered Activity

Answer 2

Torsades de Pointes, post-MI reperfusion

Question 3

Cardiac Dysrhythmias
Causes
Re-entry

Answer 3

VT and SVT

Question 4

Cardiac Dysrhythmias
Main Classifications
Bradydysrhythmias and AV Conduction Clocks

Answer 4

1o = prolonged PR interval
2o (Mobitz I) = gradual PR interval prolongation then QRS drop
2o (Mobitz II) = PR interval constant with QRS drop
3o = P wave and QRS complex unrelated, PP and RR intervals constant

Question 5

Cardiac Dysrhythmias
Main Classifications
Supraventricular Tachydysrhythmias (Narrow QRS)

Answer 5

Regular rhythm:
Atrial: sinus tachycardia, atrial tachycardia, atrial flutter
AV: SVT (AVNRT > AVRT), junctional tachycardia
Irregular rhythm:
Atrial: a fib, multifocal atrial tachycardia, SVT w/ aberrancy