ECG CORE Flashcards
What does the P wave represent
Atrial depolarisation
What does the PR interval represent
AVN Conduction delay
What does the QRS represent
Ventricular depolarisation
Atrial Repolarisation
What does the ST segment represent
Ventricular relaxation
What does the T wave represent
Ventricular repolarisation
How long should a P wave last
0.12 - 0.2 s
How long should the QRS last
0.08 - 0.1s
When can an ECG diagnose a disease (MAD PE)
MI Arrythmia Drug toxicity Pericarditis Electrolyte imbalance
What leads are used to diagnose RCA MI
Inferior
aVF 2 and 3
What leads are used to diagnose LAD
Anterior and septal
V1 - V2
What leads are used to diagnose L Circumflex (Lateral)
aVL
1
V5 AND V6
How is a LBBB Diagnosed (WiLLiaM)
S in V1
R in V5/6
How is a RBBB Diagnosed (MaRRoW)
R in V1
S in V5/6
What are the 2 normal heart sounds
S1
S2
What are the 2 pathological heart sounds
S3
S4
What does the S1 represent
Mitral and Tricuspid
What does the S2 represent
Atrial and Pulmonary
What does the S3 represent
Rapid ventricle filling @ early diastole
- Mitral regurgitation
- Heart fail
What does the S4 represent
Pathological Gallop (Blood forced into hypertrophic ventricle)
- LVH
- Aortic stenosis
What is the difference between the actions causing S3 and S4
S3 = Rapid filling of ventricle S4 = Forced filling of hypertrophic ventricle
Mitral regurgitation and heart fail share what heart sound
S3
Aortic stenosis and LVH share what heart sound
S4
