ECG revision Flashcards
What is the p wave?
Atrial depolarisation
What is the p wave?
Atrial depolarisation
How long is the p wave normally?
What is the PR interval
AV node delay
How long is a normal PR interval?
0.12 - 2.0
What is the QRS complex?
ventricular depolarisation (masks atrial repolarisation)
How long is a normal QRS?
0.06 - 0.1
What is the Q wave?
Ventricular repolarisation
What is the TP interval?
Diastole
What does AF look like on an ECG?
Absent P waves
What does Atrialf Flutter look like on an ECG?
Sawtooth baseline
What is a common cause of Right axis deviation?
RVH
What does right axis deviation ;look like on an ECG?
Downward defelction in I
Positivew upward deflection in III
What is a common cause of left axis deviation?
Conduction defects
What does left axis deviation look like on an ECG?
QRS negatve in I & III
What does RBBB look like on an ECG?
Deep S wave - I& V6
Tall R wave in V1
What does LBBB look like on an ECG?
Deep S wave - V1
Tall R waves in I & V6
Abnormal Q waves
What does WPW look like on an ECG?
Slurred upstroke on the R wave
What does hyperkalemia look like on an ECG?
Tall tented T waves
What is a main caise of ST depression?
Myocardial ischaemia
What is the normal cardiac axis?
-30 to 90
How long is the p wave normally?
less than 0.12
What is the PR interval
AV node delay
How long is a normal PR interval?
0.12 - 2.0
