ECG Flashcards
what do ECGS do
measure electrical activity of the heart (measure the voltages created by electrical activity in heart)
how many leads are there on an ECG and where are they placed
12
6 on limbs
6 on torso
what does ECG stand for
electrocardiogram
how many electrodes are there in a standard ECG and where are they placed
10
one on left/right arm and left/right leg
6 precordial electrons v1-v6 (on left pec)
what type of lead is placed on the right leg
neutral lead
what type of lead is placed on the right/left arm and left leg
right arm = augmented vector right AVR
left arm = augmented vector left AVL
left leg = augmented vector foot AVF
what do AVR and AVL and AVF reprsent
30degrees up from the horizontal line of the “heart”
avf = vector facing down
how can ECG detectors be used to identify coronary issues
depending on which ECG electrode is picking up odd signals, it can indicate the area of the heart that has problems
what does the ECG lead detect and show
movement of postive charge on the outside of heart cells
ECG shows the depolarising wave moving towards an electrode ( negative to positive) as a positive deflection/bump on graph and moving away as negative deflection
what plane do the 6 torso leads lay on
transverse plane of heart
what is ST depression and what disease can this relate to
ST segment appears abnormally low and sits below the baseline
myocardial ischaemia occurs when the blood flow through one or more of your coronary arteries is decreased.
what disease can t-wave inversion link to
myocardial ischamia
what does LBBB stand for
left bundle branch blockw
hat does RBBB stand for
right bundle branch block
what is AF
atrial fibrillation heart condition that causes an irregular and often abnormally fast heart rate
