Flashcards in Arrhythmia Deck (20)
What is the most common cause of Sudden Cardiac death?
What is the most common cause of Stroke?
What does the P-Wave represent?
Depolarization of the Atria
Those tisses with slower Action potentials are dependent upon what?
How can Ventricular Hypertrophy be diagnosed on ECG?
Height of the R wave is markedly increased
T Wave reversal
What is the mechanism of the ECG abnormalities in Ventricular Hypertrophy
Increased muscle mass delays depolarization and repolarization
Is Bundle Branch Block always pathological?
What are the EKG features of Bundle Branch Block?
What is the pathophysiology of Bundle Branch Block
Delayed activation of the ventricle since conduction tissue is blocked
What is the PR interval?
Conduction through the AV node
What is the RS interval
Polarization of the ventricles
What does the T wave represent?
What does the Q wave represent?
What are the 2 MAJOR MECHANISMS* of Cardiac ARRHYTHMIAS?
What is Enhanced Automaticity?
Occures when there is a depolarization outside the normal cycle
What phase of the action potential has been altered in Enhanced Automaticity?
Phase 4 and it is raised threshold potential
What are possible causes of Enhanced Automaticity?
1.Increases sympathetic tone
2.Decreased parasympathetic tone
What are some causes of reentry?
What are some of the possible Clinical effects of Reentry?
1.Premature Atrial Depolarization