[Comparison of electrocardiographic data with morphological picture of atrial infarct]. / Sopostavlenie elektrokardiograficheskikh dannykh s morfologicheskoi kartinoi infarkta miokarda

The electrocardiographic changes were studied in autopsyproven fresh atrial infarction and compared with the morphological pattern of the lesion. The infarction was found to localize predominantly in the posterior wall of the right atrium. The morphological pattern of atrial infarction was similar to the changes developing in focal lesions of the left ventricular myocardium. The electrocardiographic pattern was characterized by the development of various rhythm and conductivity disorders, PQ (S-TP) segment shift, longer duration of the P wave, changes in its morphology, increase in the Macrus index. The electrocardiographic signs were demonstrated most comprehensively in cases of transmural lesions and with approximately the same rate on the 1st, 2nd, and 3rd day of the lesion.

[Changes in the myocardium of the atrium in sudden death due to ischemic heart disease]. / Izmeneniia miokarda predserdii pri vnezapnoi smerti ot ishemicheskoi bolezni serdtsa.

Studies of the myocardium of the right and left atria in 31 cases of sudden death due to myocardial infarction of the ventricles or in the presence of extensive-focal cardiosclerosis were carried out. Histological techniques for staining with hematoxylin-eosine, trichrome after Masson and Goldman's method were used. Microscopic investigation of the heart in 14 cases revealed fresh areas of necrosis of the myocardium atria, which the authors evaluated as infarction. The involvement of the myocardium of the atria into the pathological process influenced the course and prognosis of ischemic heart disease.