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26 Cards in this Set

  • Front
  • Back
6 parts to EKG reading
rate
rhythm
intervals
axis
chamber abnormality
QRST changes
L axis deviation means ___
axis between -30 and -90
R axis deviation means ___
axis between 90 and 180
5 causes of L axis deviation
LVH
LBBB
inferior MI
WPW
L ant fascicular block
8 causes of R axis deviation
RBBB
RVH
PE
COPD
septal defects
lateral MI
WPW
L post fascicular block
3 required RBBB criteria
1 optional criterion
wide QRS
rsR' in R precordials
wide S wave in I and V6
ST dep or TWI in R precordials
4 required LBBB criteria
1 optional criterion
wide QRS
broad R in L leads
no Q in L leads except aVL
ST change with reciprocal QRS
PRWP, LAD, inferior lead Qs
L leads
I
aVL
V5
V6
4 criteria for L ant fascicular block
L axis deviation
qR in aVL
narrow complex
no other LAD cause present
5 criteria for L post fascicular block
RAD
rS in I and aVL
qR in III and aVF
narrow complex
no other RAD cause present
to measure QT interval, measure from ___ to ___ in ___
beginning of QRS
end of QT
longest QT interval
Bazett formula for QTc
QTc = QT/sqrt(RR)
normal QTc for men
<450 ms
normal QTc for women
<460 ms
7 kinds of causes of QT prolongation
congenital
antiarrhythmics
psych drugs
electrolyte disturbances
antibiotics
autonomic dysfunction
2 antiarrhythmic classes associated with QT prolongation
Ia
III
4 kinds of psych drugs associated with QT prolongation
antipsychotics
Li
SSRI
TCA
3 electrolyte disturbances associated with QT prolongation
hypocalcemia
hypomagnesemia
hypokalemia
2 antibiotic families associated with QT prolongation
macrolides
quinolones
8 specific antibiotics associated with QT prolongation
voriconazole
pentamidine
atovaquone
chloroquine
TMP-SMX
amantadine
foscarnet
atazanavir
4 kinds of autonomic dysfunction associated with QT prolongation
ICH
CVA
s/p CEA
s/p neck dissection
4 intrinsic cardiac causes of QT prolongation
CAD
CMP
bradycardia
high-grade AVB
2 miscellaneous causes of QT prolongation
hypothyroidism
hypothermia
criteria for L atrial abnormality: either ___ or ___ (2)
P wave duration in II > 120 ms
P wave duration in V1 > 40 ms
P wave amplitude in V1 > 1 mm
2 criteria for R atrial abnormality: either ___ or ___
P wave amplitude > 2.5 mm in II
P wave amplitued > 1.5 in V1
5 causes of LVH
HTN
AS
AR
HOCM
aortic coarctation