The ECG Blog
Pathological Q waves are among the most recognizable signs of a prior myocardial infarction (MI) on the electrocardiogram. Yet their presence is not a...
Atrial fibrillation (AF) is classically described as an irregularly irregular rhythm, defined by chaotic atrial activity and a ventricular response th...
One of the earliest and most recognized ECG manifestations of hyperkalemia is the peaked T wave—a tall, narrow, and symmetric repolarization wave that...
While cardiac action potentials are often reduced to textbook waveforms and phases, their ultimate purpose is mechanical: to produce calcium influx th...
Wenckebach phenomenon, or Mobitz Type I second-degree AV block, is traditionally taught as a benign and often physiologic conduction delay within the ...
Digoxin, a cardiac glycoside derived from the foxglove plant (Digitalis lanata), has been a staple in cardiology for centuries. Despite the emergence ...
Atrial fibrillation (AF) is classically characterized by an irregularly irregular ventricular rhythm due to chaotic atrial depolarization and random c...
Respiratory sinus arrhythmia (RSA) is a common and normal ECG finding that reflects the intricate interplay between the respiratory cycle and heart ra...
Atrial flutter is a macro-reentrant atrial tachycardia defined by organized atrial activity and rapid atrial rates, typically between 250 and 350 beat...
Ashman phenomenon is a fascinating electrocardiographic finding characterized by an aberrantly conducted supraventricular beat. Often seen in atrial f...
The presence of atrioventricular (AV) dissociation is a critical clue in diagnosing ventricular tachycardia (VT). Understanding the anatomy and physio...
This ECG was initially read as Sinus Bradycardia. What are your thoughts?
Before we begin, I highly recommend reading An Anatomical Approach to ECG...