ECG from My first ECG handbook Flashcards
LQTS risk score to diagnose congenital long qts
> = 3.5
QTc to diagnose congenital long qts
> = 500 ms in the absence of secondary cause for long qt
or
480-499 + unexplained syncope in the absence of secondary cause for long qt and absence of pathogenic mutation
Qtc to diagnose short Qt
<= 330 ms
or if QTc < 360 ms with > 1 of the ff
> pathogenic mutation
> FMhx of SQTS
> FMHx of SCD age < 40
> Survival from a VT/VF episode in the absence of HF
PVC found inserted between 2 sinus beats without alteration of sinus rate, that is not followed by a compensatory pause
interpolated PVC
Onset of QRs to its peak that favors VT
> = 50 msec
RP interval that favors SVT
<= 100 msec
QRS duration that favors VT
140 ms
What sign signifies RSr’ pattern in VT
Marriott’s sign
What sign corresponds to the notching of the S wave near its nadir
Josephson
What sign corresponds to distance from onset f QRS to S wave nadir > 100 ms
Brugada sign
Where do you place the RA lead in lewis leads?
Manubrium
Where do you place the LA lead in lewis leads?
5th ICS R parasternal border
Where do you place the LL lead in lewis leads?
right lower costal margin
St depression of ____ in 2 contiguous leads may signify acute mi
> = 0.05mv/ 0.5 mm
T wave inversion of ___ in 2 contiguous leads may signify acute mi
> = 0.1 mV/ 1mm with a prominent R wave or R/S >1
STEMI criteria for all leads except V2-v3
> = 0.1 mV elevation in 2 contiguous leads
STEMI criteria for v2-v3 in women
> =0.15mV or 1.5 mm
STEMI criteria for v2-v3 in men < 40 yrs old
> = 0.25 mV or 2.5 mm
STEMI criteria for v2-v3 in men > 40 yrs old
> = 0.2 mV or 2 mm
Duration of p wave (lead ii) : PR segmet ratio in Left atrial abnormality
> 1.6
Expected axis of terminal p wave in left atrial abnormality
-30 to -90
Prominent initial positivity in lead v1 or v2 of ____ may be expected in right atrial abnormality
> =1.5mm
Increased area under the initial positive portion of the p wave in lead v1 to _ is expected in Right atrial abnormality
> 0.06 mm/sec
Expected rightward shift of mean p wave axis to ____ is seen in right atrial abnormality
> 75 deg