Crackcast & Physicians As Humans On Canadiem

This episode covers Chapter 79 of Rosen’s Emergency Medicine. All those funny squigly marks on the ECG confusing you? Us too. Here is some knowledge to help you out. What is the blood supply of the following parts of the conduction system: SA node, AV node What are the three pathophysiologic mechanisms for dysrhythmias? What causes & how does AV nodal reentry tachycardia occur? List the classes of antidysrhythmics. Describe their mechanism of action and usual uses, as well as an example of each. How does digoxin work as an antidysrhythmic? When is it used? List underlying etiologies of sick sinus syndrome. What are three ECG presentations of sick sinus syndrome? Define 1° heart block.  List three causes. Differentiate between the two types of  2° heart block with respect to etiology, ECG appearance and management. What is ‘high grade’ heart block?  How is it managed? Describe the difference between AV dissociation & 3° AV block. Compare PAC’s to PVC’s. Give a differential diagnosis of irregularly irr