Risk factors for fibrillation
Ischemia Mitral stenosis Hyperthyroidism Alcoholic carbiomyopathy Digitalis toxicity Pulmonary Embolus Pericarditis
Normal Depolarization frequencies of the SA node, AV node, and Ventricle
SA: 60-100 AV: 40-60 Vent: 25-40
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.
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.
What are causes of Arrhythmia?
Strong sympathetic stimulation
Hypokalemia or other ion imbalances
Hypertrophy or dilation of the heart
Where are Nomotropic arrhythmias generated? Heterotropic?
Nomotropic: generated in the SA node
Heterotropic: generated anywhere else