Objective. To determine the impact of the mitral valve insufficiency in patients, suffering ischemic heart disease with lowered contractility of left ventricle and methods of its treatment. Materials and methods. During 01.01.2015-31.12.2018 yrs period in the Amosov National Institute of Cardiovascular Surgery there were conducted 2267 consecutive operations of coronary shunting, of them 190 (8.4%) - in patients, suffering the ischemic heart disease with lowered contractility of left ventricle. Reduction of the output fraction of left ventricle down to 35% and lower have served as criterion of inclusion of the patients into the Group. There were 170 (89.5%) men and 20 (10.5%) women. The patients’ age have constituted 29 - 83 yrs old, (61.1 ± 8.9) yrs old at average. Results. In 47.9% of the patients the lowering of the left ventricle contractility after myocardial infarction was followed by occurrence of regurgitation on a mitral valve. At the same time it was noted, that the regurgitation value have had correlated with degree of the left ventricle contractility lowered: in reduction of values of the left ventricle output fracture down to 25% and lower a moderate regurgitation on a mitral valve was registered up to 2 times, a significant one - in 2.5 times, and the pronounced one - in 1.5 times more frequently, than in values of the left ventricle output fracture, exceeding 25%. Occurrence of a mitral insufficiency in 18.7% patients was caused by direct damage of valvular apparatus, while in 81.3% patients the consequences of the heart cavities were present in disorder of contractile function of myocardium. Presence of postinfarction mitral insufficiency enhances the risk of an acute cardiac insufficiency in 1.7 times and necessitates intraoperative correction in values of the regurgitation fraction over 30%. Conclusion. The own data obtained witness, that noncorrected mitral insufficiency in the ischemic heart disease worsens significantly the postoperative period course after performance of coronary shunting, enhancing rate of an acute cardiac, respiratory and renal insufficiency. Thus, taking into account a negative impact of concomitant mitral valve insufficiency on efficacy of surgical interventions in the lowered contractility of left ventricle the need emerges to perform complex reconstructive intervention in patients, suffering ischemic heart disease with lowered contractility of left ventricle.
Myocardial infarction remains one of the most common causes of disability in patients. Prior myocardial infarction in 15–30% of cases leads to decrease in left ventricle (LV) contractility. Isolated drug therapy is ineffective in most cases – impressions of the coronary arteries require revascularization, including coronary artery bypass grafting. Data on the choice of optimal tactics in such patients is also limited. In addition, there is no consensus on the prognosis of mortality and management of this group of patients. Materials and methods. The study included 190 patients with the left ventricular ejection fraction (EF LV) of 35% or less, who underwent CABG at the National Amosov Institute of Cardiovascular Surgery of the NAMS of Ukraine in the period from 01.01.2015 to 31.12.2018. The age of patients ranged from 29 to 83 years (61.13 ± 8.87). There were 170 men (89.47%) and 20 women (10.53%). Our data suggests that patients with low EF LV have complications typical of coronary artery bypass grafting, but the incidence of these complications is higher and increases with the EF LV decrease (except for the central nervous system (CNS) complications where there is no correlation). At the same time, such indicators as the duration of mechanical ventilation, the number of days of stay in the intensive care unit and the total number of days of stay in the hospital are increasing. The following complications most often arose in the postoperative period: acute heart failure, respiratory failure, renal failure. Based on our data, we came to the following conclusions: in patients with reduced LV myocardial contractility, the main complications after coronary artery bypass grafting were congestive heart failure, respiratory failure, renal failure and CNS complications. Among them, regardless of the level of EF LV, the most common were acute heart failure and complications of the respiratory system. The most significant factors of preoperative condition of patients with reduced LV myocardial contractility, which increase the risk of postoperative complications and increased mortality are: EF LV 30% and below, patient age over 60 years, creatinine rise to >200 mmol/L, pulmonary hypertension over 50 mmHg. Concomitant mitral regurgitation (moderate or severe) requires obligatory intraoperative correction.
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