A 60 year old male presented with acute chest pain of 4 hours duration. Electrocardiographic examination revealed new Q wave with ST segment depression. He succummed to his illness within 24 hours of admission. The hea revealed presence of a transmural haemorrhagic area over the septum and anterior wall of the left ventricle. Light microscopic examination is most likely to reveal -
Ans. is 'b' i.e., Necrotic myofibres with presence of neutrophilsThe patient in question succumbed to myocardial infarction after about 28 hours of the attack.o The gross and microscopic appearance of an infarct depends on duration of surl of the patient following the MI. o Areas of damage undergo a progressive sequence of morphological changes that consist of typical coagulative necrosis.
Edema in between normal myofibres
Necrotic myofibres with presence of neutrophils
Coagulative necrosis of the myocytes with presence of granulation tissue
Infiltration by histocytes with haemosiderin laden macrophages