EKG part 2 Flashcards
STEMI
ST Depression
T wave Inversion
Where does the Cardiac Conduction Start?
SA node
What does ST depression generally indicate
Ischemia
What does T wave inversion mean
Previous MI- fairly recent
Damage is done
What does a Q wave look like?
O.O4 seconds wide or 1/3 the height of the R wave
How long does it take for a Q wave to show up on an EKG?
8-48 hours
When will a Q wave go away on an EKG and what does it mean?
It never goes away
Indicates the person has had an MI at some time
Q wave on EKG, indicative of an MI either previously or now.
EKG Interpretation?
Anterior Septal MI (STEMI)
EKG interpretation?
Inferior Wall MI (STEMI)
Axis
The average direction of electrical activity during ventricular depolarization
The QRS axis may shift due to phyiscal change in the position of the heart, chamber hypertrophy or conduction block
Who is R axis deviation found in/What causes this?
Normal finding in children and tall thin adults
R ventricular hypertrophy
chronic lung disease
Anterolateral MI
L posterior hemiblock
Pulmonary embolus
WPW
ASD/VSD
What can cause a L axis deviation?
L anterior hemiblock
Q waves of inferior MI
artificial cardiac pacing
emphusema
hyperkalemia
WPW
Tricuspid atresia
Ostium primum ASD
Injection of contract into left coronary artery