Details Written by Cubasi Published: December 19, 2022 Views: 76
Moscow.- A team of Russian scientists has introduced into medical practice a new method for assessing the risk of re-myocardial infarction and calculating the five-year survival time in patients who have suffered a myocardial infarction.
The observational study included 125 patients with acute myocardial infarction, 42 percent of whom were women between the ages of 30 and 83 years. The follow-up period was six years. The scientists examined the control circuits of the circulatory nerves. These circuits guarantee the coordinated work of all body elements and in particular the flexible adjustment of pulse rate and blood pressure to the current psychophysical needs of the person.
“We were the first in the world to propose an index: the cumulative percentage of S-phase synchronization reaches 100 percent when the systems under study are strictly synchronized. We have shown that it is possible to calculate this index from the electrocardiogram signals and the vascular blood flow of the finger, which can be recorded in the subject even in home conditions,” says Anatoly Karavayev, head of the Department of Dynamic Modeling and Biomedical Engineering at the Saratov State Medical University.
The scientist explained that hundreds of regulatory circuits work in the body and are linked by a very complex network of connections, the structure of which is not well understood. According to Karavayev, in practice only some indirect signals can be obtained.
“We have identified the importance of an index that characterizes the strength of the interaction between the heart rate variability parameter feedback circuits and blood flow in assessing mortality risk,” he specified.
The investigator added that in the 5-year mortality risk assessment, the quality of the functional interplay of cardiovascular regulatory mechanisms in CHD patients with acute infarction ranks second only to acute heart failure and is comparable to impaired left ventricular function as an important predictor of risk.
The university press service confirmed that a research team of physicists and cardiologists studied the dynamics of autonomic regulation of the cardiovascular system in patients with acute myocardial infarction. The researchers took into account the parameters of heart rate variability and, as a result of the analysis, identified the main indices for predicting mortality and the development of recurrent heart attacks.