ECG Flashcards
correspond to the valves closing
LUBB-DUBB
is produced when the atrioventricular valves i.e. tricuspid and bicuspid valves close at the start of ventricular systole
LUB
is produced at the beginning of ventricular diastole when the pulmonary and aortic semilunar valves close.
DUB
tricuspid and mitral valves
atrioventricular valves
located on the left side of the heart
bicuspid
located on the right side of the heart
tricuspid valve
pulmonary and aortic valves are part of
semilunar valves
are located at the connections between the pulmonary artery and the right ventricle, and the aorta and the left ventricle
semilunar valves
contraction or depolarization
systole
happens when a chamber squeezes blood out
systole
relaxation or repolarization
diastole
happens when a chamber is ready to receive blood
diastole
graphic representation of the heart’s electrical activities throughout the body
electrocardiogram
measure the difference in electrical potential between two points
leads
standard EKG leads
lead I, II, and III
3 augmented limb leads
aVR, AVL, aVF
how many precordial leads
6
generated by the combination of 3 electrodes
12-lead ECG
septal view of the heart in what electrode
V1 and V2a
anterior view of the hear
V3 and V4
lateral view of the heart
what electrode
V5 and V6
lateral view (calculated by analysing activity between RA and LA electrodes)
lead I
inferior view (calculated by analysing activity between RA and LL electrodes)
Lead II
inferior view (calculated by analysing activity between the LA and LL electrodes)
Lead III
lateral view (calculated by analysing activity between LA=LL>RA)
aVR
Lateral view calculated by analysing activity between RA=LL >LA
aVL
inferior view calculated by analysing activity between RA=LA>LL
aVF
rate at which ECG machine produces a trace
paper output speed
standard output in ECG
25 mm/s
1 small square (1mm) is equal to
0.04s
5 small square (5mm) =
0.2 sec (200ms)
5 large squares
1 second