Learning Guides
In-depth references built around real cases, with the ECG embedded inline so you can follow the tracing alongside the text.
Atrial premature complexes (APCs)
Premature beats from an ectopic atrial focus - how to spot them, tell them apart from VPCs, and read their clinical significance.
Ventricular premature complexes (VPCs)
Early, wide beats from a ventricular focus - their distinctive morphology, R-on-T, and localizing a left- versus right-ventricular origin.
Supraventricular tachycardia (SVT)
Fast rhythms arising above the ventricles - atrial, AV-nodal, and junctional tachycardias, and how to distinguish them.
Ventricular tachycardia (VT)
Runs of consecutive ventricular beats - from short paroxysms to ventricular flutter and fibrillation, and why they can be dangerous.
Atrial fibrillation (AF)
The irregularly irregular rhythm with no P waves - its three ECG hallmarks, f-waves, and hemodynamic consequences.
Atrioventricular block (AVB) types explained
The degrees of AV conduction block - first, second (Mobitz I and II), and complete third-degree - and their escape rhythms.
Bundle branch block (BBB)
When conduction down a bundle branch is delayed or blocked - the widened QRS and how to tell left from right.