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Pathology

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CVS

Question
16 out of 19
 

The cells seen after 72 hours in the infarcted area in MI are: (AIIMS May 2014)



A Neutrophils

B Lymphocytes

C Macrophages

D Monocytes

Ans. C Macrophages

Time

Gross

Light Microscopy

Reversible iniury

0-30 min

None

None

lrreversible injury

30 min to 4 hr.

None

Waviness of fibers at border (earliest change)

4-12hr.

Occasional dark mottling

Beginning of coagulative necrosis, edema and hemorrhage

12-24 hr.

Dark mottling

Ongoing coagulative necrosis, marginal contraction band necrosis,

beginning of neutrophilic infi ltration

1-3 days

Mottling with yellow tan infarct center.

Coagulation necrosis, interstitial neutrophilic infiltrate

3-7 days

Hyperemic borders, central yellow tan

softening

Beginning of disintegration with dying neutrophils, early

phagocytosis by macrophages

7-10 days

Maximum yellow tan and soft depressed red-

tan margin

Early formation of fibrovascular granulation tissue at margins

10-14 days

Red gray depressed infarct borders

Well established granulation tissue and collagen deposition

2-8 weeks

Gray-white scar progressive from border

towards infarct core

Collagen deposition, J Cellularity

> 2 months

Scarring complete

Dense collagenous scar

Have a close at the table given above, the answer is undoubtedly is lactate dehyrogenase enzyme (LDH).

CVS Flashcard List

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