ECG LITFL Flashcards by Georgia Ferguson

stemi criteria

) More than or equal to 2 mm of ST elevation in two or more leads V1-3, or
b) More than or equal to 1 mm of ST elevation in two or more contiguous
leads in any other area (V4-6, l, ll, lll, aVL or aVF), or
c) More than or equal to 1 mm of ST elevation in two or more contiguous
posterior leads (V7-9), or
d) Left bundle branch block that is known to be new

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leads in inferior STEMI

II, III, AVF

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Artery in inferior stemi

right contrary artery

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septal leads

V1, V2

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sepal Artery

left anterior decending

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anterior leads

V3-4

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anterior arteries

LAD

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lateral leads

I, AVL

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lateral artery

circumflex

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anteriorlateral leads

V5 V6

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anterior lateral arteries

circumflex

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name the H’s

hypoxia
hypovolemia
hyperglucemia
hyperkalemia

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name the T’s

thrombin
toxin
temponade
tension pnumo

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LBBB charecgeristis

wide QRS, dominate S wave in V1, notched R looks like bunny ears in V6

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RBBB characteristics

wide QRS, Bunny ears in V 1 and soured S wave in V6

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big box time

0.2, 5mm

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small box time

0.04

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1 big from R to R means

rate 300

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2 bosses between R to R means

150bpm

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how to caculate rate

bosses between R waves dived by 300 there number of boxes there are.

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QRS time

1-3 bosses (0.04-0.12)

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PR interval is

PR interval is three to five small squares (0.12-0.20 s)

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name the 8 steps of ECG int

rate, rhythm, P wave, PR, QRS, ST, T, Q, QT

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leads, reciprocal changes and artery of septal

FACING: V1, V2,
Reciprocal: nil
Artery: LAD

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leads, reciprocal changes and artery of anterior

FACING: V 3 and V4 Reciprocal: nil Artery: LAD

leads, reciprocal changes and artery of lateral

FACING: I, AVL, V5, V6 Reciprocal: II, III, AVF Artery: LAD/CX

leads, reciprocal changes and artery of antmeriorseptal

FACING: V1-V4, Reciprocal: nil Artery: LAD

leads, reciprocal changes of anteriorlateral

FACING: I, AVL, V3-V6 Reciprocal: II, III, AVF

Inferior reciprocal changes in

I, AVL

Posterior where are reciprocal changes

V1-V4

1st degree heart block rule

R far from P 1st degree

2nd degree type 2 characteristics

longer, longer, drop

2nd degree type 2 characteristics

some P's don't Get through

3rd degree heart block characteristics

P's and Q's don't agree

one large square time

0.2s

one small square Tim,e

0.04

rule of 300 to calculate HR

300/ R-R int (in large squares)

name the rates of rule of 300

1=300 2=150 3=100 4=75 5=60

how to calculate rate using rhythm strip

HR= no. of QRS x 6

define an ecg's rhythm,

it is where the action potential started

define a sinus rhythm

1. P wave upright in II 2. P waver inverted in AVR 3. each P looks the same (within the same lead)

what is cardiac axis

average direction of electrical potential during dfepolirasation of the ventricles

what do you look at to determine axis

if the QRS is mostly up (positive) our down (neg) in lead I and AVL

cherectertics of normal axis

I: positive AVL: postive

LAD cherecteritisics

I: positive AVL: neg

rad charectereisitics

I: neg AVL: pos

Extreme axis cherecterisitics

I: neg AVL: neg

what is the PR interval

atrial depolarisation and contraction

normal duration of PR

0.12-0.2 (3-5 box)

trick to finding PR

if you find one that begins close to the beginning of a big box, and QRS begins before the end of that box, you know it is not prolonged

what is the QRS representing

ventricular depolarisation

QRS should be...

less than 3 small boxes

a wide QRS represents

abnormal ventricular condition, which will affect the shape of the ST segment and T waves

what is the Q wave

the first deflection of the QRS if it is downwards

what dose the Q wave represent

normal L to R depolirsation of the septum

where is the Q wave normally seen

in L sided leads: I, AVL, V5-V6

how long should Q wave be

small box

big Q most often due to

pervious MI

R wave progression in V1 should be

negative

R wave progression in V6 should be

positive

in V what is the relationship between QRS and ST segment

QRS should be larger than ST

what dose the ST segment represent

nop eléctricas activity, thus should be flat

T wave usually inverted in...

V1, AVR

Qt is measured from

Start of the QRS to end of the T

general rule for QT int

QT should be less than half the preceding R-R int

normal QT form men

less than 440ms

normal QT for women

less than 460mms