ECG Lead Placement and Interpretation: A Comprehensive Guide, Cheat Sheet of Medicine

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ECG Lead^ Placement

=>between^ V4_^ and^ VG

S

4th /CSS

Right stemal border

· P-wave PR (^) Segment

Q-wave

• (^) u u u u AV nodeholds^ onto' · (^) Atrial depolarisation · Depolarisation of L^ +^ R^ ventricles

· SA node sends the

the (^) the (^) charge · Left Jundle (^) Granch (^) depolarises Charge

• > (^) AV node (^) (to let ventricles (^) fill with blood) (^) the Interventricular septum

· LV much

Jigger, thicker (^) so (^) more the (^) charge

goes

to LV · Net (^) movement of (^) charge back^ to^ · Net movement (^) of the^ charge to

• ve electrode the (^) node

• D (^) - D
• D I (^) I I

> (^) Y (^) Y ⑦ ST-segment T-wave S-wave u (^) u u · Depolarisation of^

Bases of ·

Entire Ventricular^ myocardium is · (^) Ventricular repolarisation

Ventricles

depolarised ,^ full^ of^ the charge · Net Movement of -ve^ charge · Net movement^ of (^) charge towards

• Ve (^) electrode · No net movement of (^) charge towards^ -^ we^ electrode ·

At isoelectric^ line

-^ Augmented^ Leads = = com m

t

Transverse section (^) of heart PrecordialLeads A

VI ->^ V

the

charge

S-wave (^) ↓ : US R-wave ↑ :

Vector of R-wave

Vector ofSe^ are V X VI -^ V V r VI (.^ "si) v2 V Due S-mave gets digger ventricle Basal (^) septum

Practise (^) Excercise Right Ventricle

Going through^ ECG (^) in Osce (^) station ①) Details^ +^ Settings

↑ = ECG

paper Pt. details Date/Time

Calibration =^ 25 mm/ and 10mm/nu

Toms

• I ② Axis (^200) mS

Look at QRS^ in Lead I + arE

Normal =^ Goth^ deflection

BAD =^ It^ and^ auF@ LAD^ =^ I auFE^ a^

Lead (^) O Extreme (^) axis (^) = (^) Both deviation overall (^) direction of

electrical charge

• Look (^) at (^) RR internal (^)? (^3) Rate-Look

at

rhythm strip 4 Rhythm does it (^) change?

• (no · (^) of QRs^ + (^) 6)
• normal is (^) 60-1006pm Atrialhm - P-waves normal^?^ <120ms -

PR intervals normal?^ 3-4^ small^ squares

(120- 200ms) S Morphology

Narrow/Normal =^ <^ 100ms

QRS (^) wave

• Widened = > (^) 100ms
  • > (^) Imm ST (^) segments - (^) Look (^) for reciprocal (^) depression (PAILS)
• (^) tall (^) , tented T waves (^) - (^) Start
• any C-waves (^) following it
• inverted
• normal
• Start (^) of Q-move^ ->^ >^ end^ of^ T-wave Q T interval^ ~

2 big squares