ECG Basics: Third-degree AV Block, Complete Heart Block
This rhythm strip shows third-degree AV block, also called complete heart block or complete AV block. The P waves are from the sinus...
Atrial Fib To Cardiac Arrest
A paramedic crew responded to the office of a local physician. A 61-year-old male presented with a one-week history of chest pain and...
Understanding the Oxygen Dissociation Curve
What is the oxygen dissociation curve? The oxygen dissociation curve is a graph that plots the proportion of haemoglobin in its...
Normal 12-Lead ECG
This ECG is nearly completely normal. We say "nearly" because there are VERY subtle changes which may or may not be chronic. ...
Wide-complex Tachycardia: Ventricular Tachycardia
This ECG is from a man who was experiencing palpitations and light-headedness with near-syncope. On first look, you will see a...
Wide Complex Bradycardia in Digitalis Toxic Patient
This ECG is from a female patient who presented with weakness. Her labs revealed digitalis toxicity and hyperkalemia. Actual lab values...