Cardiovascular Diseases - Arrhythmias

Question 1

The only electrical connection between the atria and ventricles

Answer 1

AV Node

Question 2

most common arrhythmia mechanism

Answer 2

Reentry

Question 3

central to the understanding and treatment of many cardiac arrhythmias

Answer 3

Electrophysiologic Testing

Question 4

Only reliable therapy for symptomatic bradycardia in the absence of extrinsic and reversible etiologies such as increased vagal tone, hypoxia, hypothermia, and drugs

Answer 4

permanent pacemaking

Question 5

most rapid conduction in heart

Answer 5

his bundle and bundle branches

Question 6

most expeditious technique in conduction of AV conduction block

Answer 6

transcutaneous pacemaking

Question 7

most common arrhythmia identified in extended ecg monitoring

Answer 7

atrial premature complexes

Question 8

most common sustained arrhythmia

Answer 8

atrial fibrillation

Question 9

frame to distinguish sustained from non-sustained ventricular tachycardia

Answer 9

> 30 seconds duration

Question 10

most common arrhythmia in acute cor pulmonale due to pulmonary embolism

Answer 10

sinus tachycardia

Question 11

most common arrhythmia post-M.I.

Answer 11

Premature Ventricular Contraction (PVC)

Question 12

most common lethal arrhythmia post-M.I.

Answer 12

ventricular fibrillation

Question 13

Mechanism behind ventricular fibrillation

Answer 13

“Circus Movements” due to the following:

• long conduction pathway (dilated cardiomyopathy)
• decreased conduction velocity (ischemic heart, hyperkalemia, blocked purkinje
• short refractory period (epinephrine use, electrical stimulation)