Basics & Fundamentals
Latest
Ventricular Flutter
Key Points Definition: Ventricular flutter is a rapidly fatal cardiac arrest rhythm, closely related to ventricular fibrillation, requiring immediate defibrillation and high-quality CPR. Characteristics: It is marked by regular, continuous…
TP Segment Basics
Key Points The isoelectric baseline of the ECG that spans from the end of ventricular repolarization (T wave) to the start of atrial depolarization (P wave) Used as a reference…
U Wave Basics
Key Points Definition: U waves are small, rounded waves that follow the T wave on the ECG, most commonly seen in the precordial leads (V2-V3). They are less frequently discussed…
S wave Basics
Key Points Definition: S waves are the first negative deflections following the R wave in the QRS complex, representing the late stages of ventricular depolarization. Normal vs. Abnormal: In a…
Delta Waves
Key Points Definition: Delta waves are slurred upstrokes at the beginning of the QRS complex, representing early ventricular depolarization through an accessory pathway. Associated Condition: Delta waves are a hallmark…
Barcelona Criteria
Key Point Challenge of Diagnosis in LBBB and RV Pacing: Both left bundle branch block (LBBB) and right ventricular (RV) paced rhythms can obscure the ECG identification of acute myocardial…
RV Outflow Tract Tachycardia (RVOT)
Key Points Origin: RVOT tachycardia is a type of monomorphic ventricular tachycardia (VT) that originates from the right ventricle or tricuspid annulus. Patient Population: It is most often idiopathic, occurring…
Bifasicular Block
Key Points Definition: Bifascicular block = conduction block in any two of the three ventricular fascicles: right bundle branch (RBB), left anterior fascicle (LAF), or left posterior fascicle (LPF). OMI…
Bundle Branch Blocks
Key Point Types of Bundle Branch Blocks (BBBs): The two primary types of BBBs are Right Bundle Branch Block (RBBB) and Left Bundle Branch Block (LBBB). Pseudo ST Deviation: BBBs…
Early Repolarization
Key Points Early repolarization (ER) historically referred to a normal variant of ST segment elevation, commonly known as benign early repolarization (BER). It was long considered harmless. Recent studies, however,…
Fusion Beats
Key Points Definition: A fusion beat occurs when two different electrical impulses, one from the normal conduction system (typically a supraventricular impulse) and one from an ectopic ventricular source (like…
LV Aneurysm
Key Points Persistent ST Elevation: Left ventricular aneurysm (LVA) causes persistent ST-segment elevation on the ECG, typically lasting more than 2 weeks post-myocardial infarction (MI). Common Location: This persistent elevation…
Post-Thrombolytic Reperfusion ECG Findings
Key Points Clinical Indicators of Reperfusion: After administering thrombolytics for STEMI, closely monitor the patient for resolution of symptoms, including chest pain and other ischemic signs. ECG Signs of Reperfusion:…
Pseudonormalization of T Waves
Key Points Definition: Pseudonormalization refers to the normalization of previously abnormal (inverted) T waves, often seen in the context of reocclusion of an artery that had recently been reperfused. Mechanism:…
QRS Complex Basics
Key Points Definition: The QRS complex represents ventricular depolarization, which triggers the ventricles to contract. It is measured from the begining of the Q wave till the end of the…
QRS Fragmentation (fQRS)
Key Points Definition: QRS fragmentation (fQRS) refers to the presence of additional notches or spikes within the QRS complex, observed in at least two contiguous leads corresponding to a specific…
Sinus Bradycardia
Key Points Definition: Sinus bradycardia is a cardiac rhythm where the heart rate, originating from the sinoatrial (SA) node, is slower than normal, specifically below 60 bpm. Physiological Occurrence: It…
Slow Ventricular Tachycardia (VT)
Key Points Definition: Slow ventricular tachycardia (VT) is characterized by a ventricular rate of 100-120 bpm. Distinction: Regular VT typically has a ventricular rate > 120 bpm. Context: Slow VT…
Free Content
Jump on our email list for free tips and insights delivered to your inbox monthly. No spam - just quick pearls and ECG education.
Categories
- No categories
© 2025 ECG Weekly. All rights reserved. | Terms of Use | Privacy Policy
Powered by the member(dev) platform
Loading...