ECG Interpretation. Arrhythmias of Formation Chapters 4-5. Types of Arryhthmias:. Sinus Problems: Formed in the sinus node, but irregular Ectopic Problems: Formed outside of the sinus node Conduction Problems: Formed in the sinus node, but conduction in error
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Arrhythmias of Formation
Atrial Fibrillation: Atrial Fib and/or
Atrial Flutter: 2:1 Ventricular “capture”
Ventricles can only respond to every other
Rate: >400 bpm
Atrial Cardiac Output is lost :
One focus - organized
Rate: 200-400 bpm
Atrial Cardiac Output is compromisedFibrillation vs. Flutter?
Atria contribute ~20% of the total
Cardiac output: A-Fib is non-lethal
Junctional and Ventricular
What is the threat of sustained Ventricular Tachycardia?1. What happens to diastole? 2. What happens to Cardiac Output? 3. What happens to myocardial perfusion?4. What happens to myocardial VO2?