ecg Flashcards
what is this
atrial fibrillation
no discernable p waves
irregular QRS
what is this
junctional tachycardia (a type of SVT)
normal QRS
absent p waves
what is this
ventricular tachycardia
broad QRS
what is this
p mitrale
due to LEFT atrial hypertrophy, usally caused by mitral valve stenosis
what is P pulmonale
peaked p waves
Right atrial hypertophy
caused by tricuspid stenois or pulmonary hypertension
what is the normal range of the pr interval
0.12- 0.2
what are the ecg signs of LVH
R wave is >25 mm
what is a significant q wave
> 40 mm length
> 2mm depth
presents a couple of hours after an MI
if present in lead 3 consider PE
what is QTc
QT / sqr root of RR
what are the causes of a long QT interval
acute myocardial ischaemia
myocarditis
bradycardia
head injury
hypothermia
U and E imbalance
congenital
drugs
how would you detect a left axis deviation
-ve qrs in 2 and 3
how would you detect a right axis deviation
negative qrs in lead 1
how do you detect an inferior infarct
leads 2, 3 and AVF
how do you detect a lateral infarct
leads 1, AVL, V5, V6
how do you detect an anterior infarct
precordial leads
