ECG Flashcards
describe the ECG of Brugada syndrome
V1-3 RBBB
RSR in V1
M wave
ST elevation
the ECG changes in Brugada syndrome may be ____ or only seen ___
intermittent
with provocation testing with flecainide or ajmaline
describe the ECG changes of LQTS
long QT
T wave should end before half way between the two QRS complexes
describe the ECG changes of AF
irregularly irregular
absent P waves
big wide T wave
describe the ECG changes in HCM
widespread inverted T waves - indicates structural problem
describe the ECG changes in ARVC
epsilon waves - late spike in QRS complex
describe the ECG change in WPW
short PR
broad QRS with delta wave - curved upstroke into QRS
what is the P wave
atrial depolarisation
what is the QRS
ventricular depolarisation
what is the T wave
ventricular repolarisation
what is the PR interval
AV nodal delay
what is the TP interval
ventricular relaxation (diastole)
what is the ST segment
ventricular contraction (systole)
a large square represents how long
5mm = 0.2s
how long is a normal P wave
0.08-0.1s
how long is a normal QRS
< 0.1s
how long is a normal T wave
0.12-0.2s
ST elevation in leads I, V5 and V6 is what artery
circumflex artery
lateral
ST elevation in leads II III and aVF is what artery
right coronary artery
inferior
ST elevation in leads V1 V2 V3 and V4 is what artery
LAD (anterior)
ST depression means what
ischaemia
how is TdP treated
IV magnesium sulfate
what does the ECG of TdP look like
long QT interval
wide and continuously changing QRS
what does hyperkalaemia look like on ECG
tall tented T waves
wide QRS complexes
long PR interval
sine wave pattern
what does hypokalaemia look like on ECG
prolonged PR interval
small inverted T waves
ST segment depression
what does VT look like on ECG
broad complex tachycardia
what does atrial flutter look like on ECG
saw tooth waves + 150bpm
what is seen in 1st degree heart block
PR intervals > 0.2s
what are the 2 types of 2nd degree heart block
Mobitz I and Mobitz II
what is mobitz I
progressive lengthening of PR interval eventually resulting in dropped beat
3:1
what is mobitz II
intermittent dropped beats without lengthening
2:1
p wave often not followed by QRS
what is 3rd degree heart block
no assoc. between P waves and QRS
what does acute pericarditis look like on ECG
saddle shaped ST elevation
PR depression