Factors associated with long-term prognosis in patients with myocardial infarction of the right ventricle, evaluated by the kaplane-meyer method
Keywords:prognosis, myocardium infarction of the right ventricle, delayed revascularization, gender factor, Kaplane-Meyer’s method
Aim of research. To determine the influence of myocardium infarction (MI) of the right ventricle (RV) on the development of cardio-vascular (CV) events at the long-term observation and to establish the role of factors, associated with the unfavorable prognosis of patients with myocardium infarction of the right ventricle.
Materials and methods. There were examined 309 patients with Q-MI of the left ventricle (LV), age 65,5 ± 4,42years old. Patients were divided in 3 groups: 1 group - 155 patients with MI RV on the background of Q-MI of the back wall of the LV, 2 group - 53 patients with MI RV on the background of Q-MI of the circular localization, 3 group - 101 patients with Q-MI of the back wall of LV. The observation period was 30,6 ± 4,5 months. The end points were considered as: unstable angina (UA), repeated MI, acute disorders of the cerebral blood circulation (ADCB), hospitalization because of heart failure (HF) decompensation and CV-death. The statistical researches included the method of Kaplane-Meyer and χ2-Pearson test.
Results. After 30,6 months of observation the frequency of CV-complications was reliably higher in both groups of patients with MI RV (р = 0,0039; р = 0,00012) comparing with the third group. There was no any essential difference in the frequency of end points between 1 and 2 group with MI RV (p = 0,053). The planned revascularization is connected with the increase of the life quality of patients after MI RV after the reliable influence of CV-death index. In 30,6 months of rehabilitation men and women in both groups with MI RV had no essential difference in the frequency of repeated MI, ADCB, HF and HF-hospitalizations, but the index of CV-death was reliably higher among female persons (р <0,05).
Conclusion. The presence of MI RV in patients with Q-MI LV is connected with the higher frequency of CV-events during 30,6 months of observation. MI RV in women is associated with the essential increase of the risk of CV-mortality during 30,6 months of observation. The delayed revascularization is associated with the decrease of the risk of CV-events development, without influencing CV-death index
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