bundle branch blocks

related: Cardiology
source: https://litfl.com/right-bundle-branch-block-rbbb-ecg-library/
- https://litfl.com/left-bundle-branch-block-lbbb-ecg-library/
tags: #note

WilLiam MoRrow

RBBB

RSR in V1
slurred S in lateral leads
sometimes T wave inversion in precordial leads, appropriate discordance
incomplete RBBB: RSR in V1 but QRS < 120
M shape, then W shape

LBBB

Large S in V1; QS in V1 or rS (W shape)
Large R in lateral leads
Notched V6 (M)
W shape in V1, M shape in V6

Backlinks

Cardiology
Cardiology
- Keywords:: Step 3, Medicine
Anatomy
- Epidemiology and Risk Factors
- Diagnostic Testing in Cardiology
- Coronary Artery Disease
- Heart Failure
- Arrhythmias
- Valvular Heart Disease
- Myocardial Disease
- Pericardial Disease
- Adult Congenital Heart Disease
- Diseases of the Aorta
- Peripheral Artery Disease
- Cardiovascular Disease in Cancer Survivors
- Pregnancy and Cardiovascular Disease
EKG Basics
EKG basics
- related: Cardiology, bundle branch blocks, ECG samples
EKG leads
- Chest leads aka precordial leads:
- V1-V2: anteroseptal
- V3-V4: anteroapical
- V5-V6: anterolateral
- Limb leads:
- LA: left arm
- RA: right arm
- LL: left leg
Brugada Syndrome
Brugada syndrome
- related: Cardiology, EKG basics, bundle branch blocks
- tags: #note
Pathophysiology
- Na channel mutation
- triggered by stress or drugs
Brugada sign
- ST elevation in V1-V3 followed by negative T wave
- Electrocardiogram demonstrating a type 1 Brugada pattern, ≥2 mm J-point elevation,