TBL 4 Flashcards
Normal ECG paper calibrations:
i) 1 small square=________second (X-axis)= ________ (Y-axis)
ii) Standardized speed of ECG machine (USA): ________ mm/second
leads I, II, III, aVR, aVL, and aVF lie in the ________ plane,
while leads VI to V6 lie in the _______
plane
leads I, II, III, aVR, aVL, and aVF lie in the vertical plane, while leads VI to V6 lie in the horizontal
plane
– Anterior leads: _________
(Note: _______________[LAD] coronary artery supplies anterolateral myocardium, apex, interventricular septum, 45–55% of the left ventricle of heart)
- Lateral leads: __________
(Note: ____________ [LCX] coronary artery supplies posterolateral left
ventricle, and anterolateral papillary muscle of heart)
Inferior leads: ________
(Note:______________ It contributes the right side of the heart, and parts of
interventricular septum)
Septal leads:________
V1 and V2
I. Bipolar (standard) limb leads placement
Einthoven’s triangle
what is Goldberger’s central terminal
lead 1,2,3 and avL, avR and avF are all on the ____ plane
where are the precordial leads place and what is the Wilson’s central terminal?
draw out ecg and all its components.
in the precordial leads
what happens to the R and S waves
Major components of a normal ECG:
i) P wave:
* depol of _____
* no notching or peaking; two-humped and bufid in _________
* normal duration of P wave: less than _______seconds
tall, peaked, and prolonged duration in right atrial
enlargement
what does Q tell you?
what does R wave tell you?
- grow in size from lead V1 to V6– Characteristically, in a healthy adult, __________ get larger and ________ get smaller from lead V1 to lead V6
what does the S wave tell you?
what does the QRS complex tell you?
normal duration of QRS complex: ____________ seconds
prolonged duration in _______________
irregular in ______________
what does a T wave tell you and how long does it last?
peaked in ________
inverted in __________
inverted in ventricular myocardial ischemia
inverted T wave leads is _________________________
normal duration
what does an S-T segment tell you?
when ventricles are fully depol.
what does the R-R interval tell you?
does does the P-R interval tell you?
average duration?
often prolonged in _________, etc
first degree heart block
Q-T interval:
what does it tell you
average time
prolonged in _________________
what does is a cardiac vector and what does it mean?
what are the
– lead I is
– lead II is
– lead III is
– lead aVR is
– lead aVL is
– lead aVF is
– lead I is 0
– lead II is +60
– lead III is +120
– lead aVR is -150
– lead aVL is -30
– lead aVF is +90
right vs left axis deviation
