AV Dissociation
Results:
Second-Degree AV Block, High-Grade
(“Advanced AV Block”)
Key Points Definition: A severe form of second-degree AV block—most often Mobitz II—characterized by multiple consecutive non-conducted P waves (e.g., 3:1 or 4:1 conduction). PR Intervals: Constant before conducted beats,…
Ventricular Tachycardia (VT)
Key Points Definition: VT is a wide complex tachycardia arising from the ventricles, defined as ≥3 consecutive ventricular beats, QRS duration >120 ms, with rapid heart rate typically 120-250 bpm….
Bradydysrhythmia: when is it actually considered a complete heart block?
A 52-year-old man presents to the emergency department with chest pain associated with nausea and diaphoresis. The following ECG is obtained on arrival:
Bradyarrhythmias: the nuances of complete heart blocks
A 50-year-old man presents to the emergency department with generalized weakness and lightheadedness. He is noted to be bradycardic, and the following ECG is obtained:
AV Block Bootcamp (Episode 2/3): what is the atrium doing, what is the ventricle doing, and what is their relationship?
A 72-year-old female presents to the ED with dyspnea. The following ECG is obtained:
AV Block Bootcamp (Episode 1/3): differential diagnoses for non-conducted P waves, what you need to know to clinch the diagnosis!
A 78-year-old female presents to the ED with lightheadedness and bradycardia. The following ECG is obtained:
Rhythm Interpretation: is the PR interval constant, lengthening, or randomly changing?
A 78-year-old woman presents to the emergency department after an episode of syncope. The following ECG is obtained:
Rhythm Interpretation: AV dissociation does not always mean there is a complete heart block
A 64-year-old woman presents to the emergency department with sore throat. The following ECG was obtained at triage:
Rhythm Interpretation: is it possible for a 12-year-old to have complete heart block?
A 12-year-old boy is brought into an emergency department in Oman for chest pain and joint pain. The following ECG is obtained:
ECG Tags
- & Myocardial Ischemia
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- 1st degree AV Block
- 1st degree AVB
- 2:1 AV Block
- 2:1 AVB
- 2:1 Conduction
- 2015 ECG Competition
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- 2025 ACC/AHA/ACEP/NAEMSP/SCAI Clinical Practice Guidelines for the Management of Patients with Acute Coronary Syndromes
- 2025 ACS guidelines
- 3rd degree AV block
- 5 Step Approach
- 5-FU
- aberrancy
- Aberrant conduction
- Abnormal ECG
- Abnormal P wave Axis DDx
- absent p waves
- Accelerated idioventricular rhythm
- accelerated junctional rhythm
- Acidosis
- ACS
- ACS mimics
- ACS RIsk Factors
- Acute Chest Pain
- Acute Chest Pain DDx
- Acute Coronary Syndromes (ACS)
- Acute MI
- Acute Pericarditis
- Acute Pericarditis vs. STEMI
- Adenosine
- Adenosine sensitive VT
- Advanced AV block
- Afib
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- AI
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- AIVR
- Algorithm Limitations
- Altered Mental Status Emergencies
- AMI
- Amiodarone
- and Lead II R-wave-peak-time (RWPT) algorithms
- Anemia
- anemia in ACS
- Anterior STEMI
- Anterior T wave inversions
- antidromic
- antidromic SVT
- Aortic Dissection
- Approach to ECG
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- Appropriate Discordance
- April Fools
- arrhythmogenic cardiomyopathy
- Arrhythmogenic right ventricular cardiomyopathy
- Arrhythmogenic right ventricular dysplasia/cardiomyopathy
- Arrhythmogenic RV Dysplasia
- Artifact
- artifact vs. malignant arrhythmias
- artifact vs. torsades
- artifact vs. ventricular fibrillation
- Artifact vs. ventricular rhythm
- artifact vs. ventricular tachycardia
- Artificial Intelligence
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- Atherosclerosis
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- atrial arrhythmias
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- Atrial fibrillation
- Atrial Fibrillation (AFib)
- atrial fibrillation with complete heart block
- Atrial Fibrillation with RVR
- Atrial Fibrillation with SVT
- Atrial Fibrillation with WPW
- Atrial flitter
- Atrial flutter
- Atrial Flutter 1:1 Conduction
- atrial flutter 2:!
- atrial flutter 2:1 conduction
- atrial flutter mimics
- Atrial Flutter with Variable Conduction
- Atrial parasystole
- Atrial septal defect
- Atrial Septal Defect (ASD) & Crochetage Pattern
- Atrial tachycardia
- Atrifact
- Atrioventricular blocks
- Atrioventricular Blocks (AVB) Summary
- Atrioventricular Nodal Reentry Tachycardia
- Atrioventricular Reciprocating Tachycardia
- Attending Level Curriculum
- AV Block
- AV Block: Second-Degree
- AV Blocks
- AV Dissociation
- AV dissociation without complete heart block
- AVB
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- AVD
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- aVR
- Axis
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- Basics
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- BBB
- BBBs & Paced Rhythms vs. STEMI
- Benign early repolarization
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- Beta-Blocker (BB) and Calcium Channel Blocker (CCB) Toxicity
- bidirectional ventricular tachycardia
- bifascicular block
- bifid p waves
- bigeminy
- Biphasic T-waves
- Bix rule
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- Blocked PAC’s
- Board review
- bpm
- brady
- brady tachy syndrome
- bradyarrhythmia
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- Buried P Waves
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- cocaine
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- congenital long QT syndrome
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- COPD
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- COVID-19
- Crochetage
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- ddx
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- de Winter
- de Winter T-wave
- de Winter T-waves
- defibrillation
- Delta waves
- deWinter
- deWinter T-waves
- Dextrocardia
- differential diagnoses
- differential diagnoses for left axis deviation
- Diffuse ST elevation
- Diffuse ST Elevation DDx
- Diffuse ST-segment Elevation
- Diffuse STE
- dig effect
- digoxin
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- Digoxin toxicity
- DKA
- Dominant R wave
- Dominant R wave in aVR
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- dresslers
- dresslers syndrome
- Dysrhythmia
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- Dysrhythmias
- Earliest ECG Evidence of Occlusion MI
- Early cardiac ischemia
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- early signs of cardiac ischemia
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- ecg 101
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- ecg history
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- EMS
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- Epsilon waves
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- evolution of ecg
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- extreme axis deviation
- failure to capture
- failure to pace
- failure to sense
- Fascicular blocks
- fever
- First-Degree AV Block
- Flattened T Waves
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- Foundational Resident
- Framingham formula
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- high lateral STEMI
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- high risk pe
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- High-Grade (Advanced AV Block)
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- Himalayan T-waves
- history of ecg
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- HOCM
- Hodges formula
- Hypeacute T waves
- hyperacute
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- Hypercalcemia
- Hyperkalemia
- Hyperkalemia emergencies
- hyperkalemia mimics
- Hyperkalemia vs. STEMI
- Hyperkalemia vs. VT
- Hyperkalemic paralysis
- Hyperkalemic Periodic Paralysis
- Hyperkalemic Periodic Paralysis (“Impressive Syndrome”)
- Hypermagnesemia
- Hypertrophic
- Hypertrophic Cardiomyopathy
- Hypertrophic obstructive cardiomyopathy
- Hypocalcemia
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- Hypokalemic paralysis
- hypokalemic periodic paralysis
- Hypomagnesemia
- hyponatremia
- Hypothermia
- Idioventricular rhythms
- Impressive syndrome
- in-training exam
- inappropriate sinus tachycardia
- incomplete right bundle branch block
- indeterminate axis
- indeterminate QRS axis
- inferior STEMI
- inservice exam
- intermittent
- Intermittent WPW
- intervals
- Intracranial hemorrhage
- Intractable chest pain
- inverted P Waves
- Inverted T Waves
- Inverted U-waves
- IRBBB
- Irregular rhythm
- irregular rhythms
- Ischemia
- Ischemia & Infarction
- Ischemic T-waves
- Isoelectric baseline
- Isoelectric segment
- Isoelectric Segment of the ECG
- Isolated Posterior STEMI
- Isorhythmic AV dissociation
- Isorhythmic AVD
- ITE prep
- ITE review
- J point
- J wave
- J-waves
- Jervell
- Jervell and Lange-Nielsen Syndrome
- JLNS
- Josephson Sign
- Josephson’s sign
- junctional escape capture bigeminy
- junctional escape rhythms
- junctional rhythm
- Junctional rhythms
- Junctional Tachycardia
- Juvenile T wave inversions
- Juvenile T waves
- Juvenile T-wave pattern
- kid
- kid ecg
- kids
- killer differentials
- LAD
- LAD OMI
- LAE
- LAFB
- Lange
- Large T Wave DDx
- Large T-waves
- LBBB
- LBBB DDx
- lead misplacement
- lead V1
- left anterior fascicular block
- Left Atrial Enlargement
- Left axis deviation
- left axis deviation ddx
- left bundle branch block
- left posterior fascicular block
- Left Ventricular Hypertrophy (LVH)
- Left ventricular hypertrophy vs. STEMI
- lewis
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- Literature review
- Long QT
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- Low Voltage
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- LPFB
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- LQTS
- LV Aneurysm
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- Mobitz I
- Mobitz I (Wenckebach)
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- Mobitz II (Hay)
- Mobitz II AV block
- modified lead
- Modified Sgarbossa criteria
- Monomorphic Ventricular Tachycardia
- monomorphic VT
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- Myocarditis
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- Na channel blocker toxicity
- narrow & irregular tachycardia
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- Narrow Complex Regular Tachycardia
- narrow complex regular tachycardia differential
- Narrow Complex Tachycardia
- narrow qrs bradycardia
- Narrow QRS Bradycardia DDx
- New Q Waves
- New RBBB and LAFB
- Nielsen
- Nikelekam T-waves
- No clear P waves DDx
- Non-conducted P wave (P:QRS>1) DDx
- non-conducted PACs
- Non-STE ACS
- Non-sustained Ventricular tachycardia
- Non-sustained VT
- Nonspecific intraventricular conduction delay
- nonsustained
- nonsustained ventricular tachycardia
- Nonsustained VT
- normal
- Normal Cardiac Conduction
- Normal ECG
- normal heart rate
- Normal Heart Rate Ranges by Age
- normal lead placement
- normal qrs axis
- Normal R wave progression
- Normal Sinus Rhythm
- Normal STAT ECG
- Normal variant patterns
- normal variant ST elevation
- Normal variants
- Not Enough P Waves (P:QRS < 1) DDx
- Not normal ecg
- NSVT
- Occlusion MI
- Occlusion MI - STEMI Criteria & Beyond
- Occlusion MI patterns
- OMI
- OMI pa
- OMI Pattern
- OMI Pattern: ST Depression V1-V4
- OMI Patterns in Left Bundle Branch Block
- OMI Patterns in Ventricular Paced Rhythms
- OMI Patterns: STEMI (-) Occlusion MI
- Opiate Toxicity
- orthodromic
- orthodromic SVT
- Osborn waves
- overdose
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- Pacemaker
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- PE
- PE vs. STEMI
- peaked P waves
- Pediatric ECG
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- Pediatrics
- Pericardial effusion
- Pericardial Tamponade
- Pericarditis
- pericarditis vs acs
- Pericarditis vs. STEMI
- Periodic paralysis
- Persistent juvenile T-wave pattern
- PFO
- PGY-2 (Intermediate) Resident Curriculum
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- PGY1 Curriculum
- PJC
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- PJTW
- plaque rupture
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- Polymorphic VT
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- POSTERIOR OMI
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- postural orthostatic tachycardia syndrome
- Potpourri
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- preexcited af
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- Prehospital ECG
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- Rescue PCI
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- right atrial enlargement
- Right axis
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- right heart strain
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- second degree av block
- Second-Degree AV Block Type I (Mobitz I / Wenckebach)
- Second-Degree AV Block Type II (Mobitz II)
- Second-Degree AV Block with 2:1 Conduction
- segments
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- Serial ECG
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- Severe Hyperkalemia
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- Sgarbossa
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- Short PR interval
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- SHS
- sick sinus syndrome
- Sinoatrial Exit Block
- Sinoatrial Nodal Reentry Tachycardia
- Sinoatrial Nodal Reentry Tachycardia (SANRT)
- Sinus arrest
- sinus arrhythmia
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- sinus inversus totalis
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- Sinus Node Dysfunction (Sick Sinus Syndrome
- sinus rhythm
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- situs inversus
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- Sodium channel blocker toxicity
- South Africa
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- spiked
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- Spontaneous Coronary Artery Dissection
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- ST
- ST depression
- ST depression differential
- ST Depression in V1-V4 DDx
- ST depression V1-V4
- ST Elevation
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- ST-segment
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- stat
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- steeple sign
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- STEMI
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- stepwise approach
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- Subtle ST elevation
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- synchronization
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- syncope ddx
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- syncope emergencies
- Systematic approach to ECG
- T wave
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- T Wave Inversion in V1-V3 DDx
- T wave inversions in V1-V3
- T wave morphology
- T-wave abnormalities
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- T-wave inversions
- T-waves
- Tachycardia
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- Takotsubo Cardiomyopathy vs. STEMI
- Tall R wave in aVR
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- TCA toxicity
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- the basics
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- The Curriculum
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- urgent cath
- V1
- v1-v2 placed too high
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- vasospasm
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- ventricular escape rhythms
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- Ventricular Flutter
- Ventricular rhythm
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- Ventricular Tachycardia (VT)
- Ventricular tachycardia mimics
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- Ventricular Tachycardiak
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- voltage
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- wide complex irregular tachycardia
- Wide complex QRS
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- Wide complex tachycardia
- Wide QRS
- Wide QRS (BBBs & Paced Rhythms) vs. STEMI
- wide qrs bradycardia
- Wide QRS Complex DDx
- wide qrs differential
- Wide QRS interval
- wide vs. narrow QRS
- Wolff Parkinson White
- Wolff-Parkinson White (WPW) Syndrome
- WPW
- wpw syndrome
- WPW syndrome and Pseudo-MI patterns
- WPW vs STEMI
- WPW with Antidromic SVT
- WPW with atrial fibrillation
- WPW with Orthodromic SVT
- WPW with SVT
- Young patients
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