Advanced EKG Flashcards

1
Q

Lead one negative lead placement

A

under R clavicle

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2
Q

Lead one positive lead placement

A

under the L calvicle

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3
Q

Lead two lead placement

A

Below L pectoral muscle= positive
R clavicle = negative lead

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4
Q

Lead two positive lead placement

A

Below L pectoral muscle

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5
Q

Lead of choice for electrical conversion

A

Lead 2

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6
Q

Lead 3 electrode placement

A

L pectoral muscle = positive
negative lead = L clavicle

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7
Q

MCL (V1) placement

A

negative = under L clavicle
positive= 4th intercostal space R sternal border

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8
Q

12 lead ECG general placement for the leads

A

10 leads
one on each limb (4)
6 on the L chest.

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9
Q

V1 placement

A

4th intercostal space, right of the sternum

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10
Q

V2 placement

A

4th intercostal space, left of the sternum

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11
Q

V3 Placement

A

Between V4 and V2

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12
Q

V4 Placement

A

5th intercostal space, left of sternum- mid clavicular line

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13
Q

V5 placement

A

5th intercostal space, left of sternum- anterior axillary line

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14
Q

V6 placement

A

5th intercostal space, left of sternum- mid axillary line

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15
Q

Characteristics of RSR’

A

start with upstroke, downstroke, upstroke
prime = second time to go about the isoelectric line

RSR’ typically seen in RBBB in MCL lead

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16
Q

causes of L axis deviation

A

chronic htn
LV hypertrophy
aortic disease
extreme exercise

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17
Q

causes of R axis deviations

A

Severe lung disease,
PE
pulmonary valve disease

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18
Q

Pathologic L axis

A

(-40)-(-90)
+ lead 1, negative lead 2 and 3
Anterior hemiblock
disease process

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19
Q

Physiologic L axis

A

0-(-40)
+ lead 1, positive or biphasic lead 2, negative lead 3
normal variant in some especially the obese and the athletic

20
Q

Right axis deviation

A

90-180
negative lead 1, positive, negative or biphasic lead 2, postive lead 3
posterior hemiblock
Pathologic in all adults

21
Q

Extreme right axis deviation

A

no mans land
1-3 leads are negative
ventricular origin

22
Q

Determining R or L BBB what lead do you use?

A

MCL (V 1)
QRS complex must be at least .12sec ( (120 ms) or wider (or 3 little squares)
Arrow points up - turn signal up - Right BBB
Arrow points down - turn signal down - Left BBB

23
Q

Normal heart axis

A

0-+90 degreees
leads 1-3 = +

24
Q

Lidocaine and procainamide are contraindicated in what rhythm

A

intraventricular block

25
Q

RCA myocardial blood supply

A

Inferior walls (LV)
Posterior Wall (LV
R Vent
SA and AV node
Posterior fascicle of LBB

26
Q

RCA occlusions can cause what arrhythmia

A

Bradycardia

27
Q

LAD blood supply

A

widow maker
anterior wall of the LV
Septal wall
Bundle of his and BB

28
Q

Circumflex blood supply

A

Lateral wall of LV
SA and AV node
Posterior wall of LV

29
Q

AMI interventions

A

O2, NTG, Pain control
ASA, heparin
Thrombolytic prescreen
Thrombolytic given

30
Q

Contraindications for Thrombolytics

A

CV, ischemic stroke w/ thrombolytics (weakened bv), active bleeding, head injuries, uncontrolled htn

relative; age, pregnancy, uncontrolled htn (>180/110), major sx in last 3 weeks.

31
Q

Ischemia

A

Transient reduction in blood flow to the myocardium
Symmetrical inverted T waves in 2 or more related leads

32
Q

inverted T waves are normal in what leads?

A

leads 3 and V1

33
Q

injury pattern

A

Injured yet salvageable
ST segment elevation of more than 1mm in 2 or more related leads
Most important thing to look for

34
Q

ST depression

A

Reciprocal changes to other ST elevation
Can indicate subendocardial injury
Ischemia
Drug or electrolyte problems (dig or hypokalemia)

35
Q

Infarction

A

Death or Necrosis of Tissue
Pathologic Q waves
> 40 ms wide or 1/3 depth of r wave height
When seen with ST elevation - AMI

Q wave = full thickness (transmural)

36
Q

Inferior location

A

RCA
leads ; 2,3,avf
recip; 1,AVL

37
Q

Septal leads and blood supply

A

LAD
leads V1,V2

38
Q

Anterior Leads and blood supply

A

LAD
leads; V3,V4
recip; 2,3,F

39
Q

Lateral Leads and blood supply

A

circumflex
leads; V5,V6, 1, L
recip; 2,3,f

40
Q

Posterior leads and blood supply

A

RCA
leads; V8, V9 R>S in V1
recip; ST dep V1-4

41
Q

Right Vent location

A

RCA
leads V4R

42
Q

Most commonly seen MI

A

Inferior MI

43
Q

Inferior wall MI hemodynamics

A

bradycardia, hypotension
1st degree or second degree type 1

N/V

44
Q

Most lethal MI

A

Anterior wall MI

45
Q

Anterior wall MI caveats

A

can suddenly develop, CHB, VF or VT
if seen with hemiblocks or BBB, place quick combo pads on the patient and prepare for the worst
can extend to septum (anteroseptal) or lateral (anterolateral)
nitrates are great, fluids are spared

46
Q

Pericarditis

A

ST elevation in all leads
Patient feels better when they lean forward
Pericarditis will not have reciprocal ST depression

47
Q

Dissecting Thoracic Aortic Aneurysm

A

Dangerous if misdiagnosed as an MI
Heparin and NTG can be fatal
Does not have reciprocal changes