ECG: Arrhythmias Flashcards Preview

Pathophysiology > ECG: Arrhythmias > Flashcards

Flashcards in ECG: Arrhythmias Deck (6):
1

Risk factors for fibrillation

Ischemia Mitral stenosis Hyperthyroidism Alcoholic carbiomyopathy Digitalis toxicity Pulmonary Embolus Pericarditis

2

Normal Depolarization frequencies of the SA node, AV node, and Ventricle

SA: 60-100 AV: 40-60 Vent: 25-40

3

What does it mean if an extrasystolic or premature beat is undercompensated?

 

That the impulse was generated from a supraventricular location. 

-If the following beat is compensated or overcompensated, then the location may be supraventricular or ventricular.

4

What is the difference between the QRS complex for impulses generated supraventricularly vs ventricularly?

Supraventricular beats have narrow QRS complexes

Ventricular have wider QRS complexes. 

5

What are causes of Arrhythmia?

Hypoxia

Ischemia

Myocardial infection

Hyperthyroidism

Strong sympathetic stimulation

Drugs (digitalis)

Hypokalemia or other ion imbalances

Bradycardia

Hypertrophy or dilation of the heart

6

Where are Nomotropic arrhythmias generated? Heterotropic?

Nomotropic: generated in the SA node

Heterotropic: generated anywhere else