Background: Cardiovascular events remain one of the frequently reported causes of death globally. Aims: Assess the early laboratory and instrumental changes in systemic manner. Objectives: Patients with fresh myocardial infarction that has been occurred in less than 30 days before hospitalization in the rehabilitation hospital. Materials and methods: A single large scale retrospective cohort sectional study for patient with fresh myocardial infarction for the period of 2014-2019, data collected from Mordovia Rehabilitation Hospital. The study involved 154 patients and analyzed 76 parameters for each patient. The t-test, Pearson correlation coefficient, and ROC test has been used. For statistical analysis used Statistica program. Results: The sample included 154 patients with history of fresh myocardial infarction. Of 154. 51(33.11%) female and 103 (66.88 %) males. chronic heart failure (CHF), which is seen in 42 (27.27273 %) patients, 101 (65.58442 %) did not have a CHF, and 11 (7.14286 %) missing data. Diabetes mellitus (DM) has been observed in 28 (18.18182 %), 118 (76.62338 %) without DM, Hypertension has been seen in 118 (76.62338 %), 28 (18.18182%) did not have hypertension, chronic kidney disease (CKD) has been seen in 11 (7.14%) patients, 131 (85.06494 %) did not have CKD, Chronic obstructive pulmonary disease (COPD) existed in 14 (9.09091%), 132 (85.71429 %) did not have COPD. Post myocardial infarction (MI) CHF has been seen in 108 (70.12987%), 42 (27.27273 %) did not have CHF. Post MI arrythmia seen in 50 (32.47%) patients, 99 (64.28571%) did not have arrythmia. Early post MI complication such as aneurysm has been seen in 12 (7.79221%), 138 (89.61039 %) did not have aneurysm, Dressler syndrome; pericarditis has been seen in 4 (2.59740%) patients, pneumonitis seen in 1 (0.64935%) patient, and pleuritis have not been seen. Conclusions: Systemic manifestations include kidney function impairment or development of new kidney disease. Of these changes include increase in the aorta basement diameter, increase in the right ventricle wall thickness, decrease in the level of serum red blood cell, serum potassium level, and serum calcium level, with increase in the serum myoglobulin. Others: Females are more frequently affected with post MI urinary tract infection.