ECG Flashcards
S1 Q3 T3
Pulmonary Embolism
Hyperkalaemia and hypercalcemia similarity?
Shortened QT interval
Hypokalaemia and hypocalcemia similarity?
Prolonged QT interval
Hyperkalaemia classification by serum Potassium level?
Mild < 6.0 mmol/L
Moderate 6.0 - 7.0 mmol/L
Severe > 7.0 mmol/L
T tall versus hyperacute T?
T tall of Hyperkalaemia: symmetrical T wave, narrow based, tented, pointed tip
Hyperacute T of Myocardial infarction: asymmetrical T wave, broad based, not tented, not pointed
What is the term for sinus rhythm without discernible P waves in severe hyperkalaemia?
Sinoventricular rhythm,
because the slowing of conduction in internodal pathways and/or across the atria
Severe hyperkalaemia?
brady, discnernible P, prolonged PR, wide QRS, peaked T
What abnormalities of Wellens’ Syndrome show on ECG?
- Type 1: deep symmetrical T wave inversion
- Type 2: biphasic T wave inversion
What are the ECG hallmarks of LAFB?
LAD with rS in II, III, aVF
(rS in II, tall R in I)
normal QRS duration
What is the most common intraventricular conduction abnormality?
LAFB,
Because LAF is the longest and thinnest structure that is prone to injury
What are the ECG hallmarks of LPFB?
RAD with rS in I
(rS in I, tall R in II)
normal QRS duration
ECG of pericardial effusion?
Low QRS voltage
(< 6 mV in limb, < 11 mV in precordial)
Electrical alternans
(beat-to-beat alternation in QRS axis caused by periodic swinging heart motion)
Pericarditis?
Diffuse: PR depression, ST elevation
aVR: PR elevation, ST depression
What is Wellen’s Syndrome?
Evolution of T wave inversion in V2-V3 detected only during pain-free period caused by the critical stenosis of LAD with little to absent in cardiac enzyme levels (never discharge these patients home)
