Normal ECG Flashcards
In which leads is the P wave positive?
In which leads is the P wave inverted?
P wave will be up or down in which leads?
1, 2, V4, V5, V6 and aVF
aVR
3, aVL, other chest leads
What is the acceptable range for the P-R interval?
.12 to .20 seconds
What is the acceptable range for the QRS interval?
What is the acceptable range for a Q wave?
.05 to .10 seconds
no more than .03 sec and 1-2mm tall in 1, aVL, aVF, V5 and V6
What is the acceptable elevation for the ST segment?
What is the acceptable depression for the ST segment?
No more than 1mm in standard leads
No more than 2mm in chest leads
No more than 1/2mm
In which leads is the T wave positive?
In which leads is the T wave inverted?
In which leads is the T wave variable?
1, 2, V3-V6
aVR
3, aVL, aVF, V1-2
What is the acceptable range for height of the T wave?
5mm in standard leads
10mm in precordial leads
What might an elongated QRS interval signify?
Bundle branch block
What are the “official” values for tachycardia and bradycardia?
Tachycardia = >100 bmp
Bradycardia = <60 bpm
What may an ST depression indicate?
What may an ST elevation indicate?
subendoardial ischemia
subepicardial or transmural injury or ischemia
What is the concern associated with inverted T waves?
With tall upright T waves?
ischemia
hyperkalemia
What is the concern associated with ST elevation?
What is the concern associated with a Q wave/QS complex?
pattern of injury (ischmia)
pattern of necrosis or infarct
Exaggerated upright T waves in a pt without chest pain or hx concerning for CAD and without s/s of hyperkalemia can be said to be
a normal variant
abnormal, notched P waves taller in lead I than in lead 3 are associated with what?
Flat P in lead I that gets tall and point in lead 2-3 is assocaited with what?
Inverted P in leads 2-3 with short PR interval is associated with what?
P-mitrale (mitral dz, p wave kinda looks like an “m”)
P-pulmonale, pulmonary valve dz
AV junctional rhythm
What is associated with a R-S-R’-S’ reading?
What is associated with a very prominent Q wave?
bundle branch block
Old infarction
What does it mean if you see ST depression after 2 min of exercise?
impending CAD/infarct