Joanna Aftyka
supervisor: Jan Żebrowski
A stroke is a neurological disorder. There are two types of stroke: ischemic (more common) and hemorrhagic. The results show that by observing the heart rate variability (HRV) it is possible to determine in which hemisphere of the brain (right or left) the stroke occurred.
An ischemic stroke is caused by severe narrowing or blockage of the vessels that supply blood to the brain. As a result of an ischemic stroke, blood does not flow to the brain, so the brain is cut off from oxygen and nutrients. As a result, the hypoxic fragments die.
For several years, the concept of a physiological network has been postulated in the field of biomedical science. The human body is not a collection of several independent organs, but a system of interconnected and interacting systems. Changes in one system in the human body can affect the functioning of another system.
In my research, I analyze the records of heart rate variability in patients after ischemic stroke. The records of 64 people in the acute phase of ischemic stroke (within the first 7 days of admission to the hospital) were analyzed. 24h Holter EKG recordings were analyzed.
The use one of the non-linear method of HRV - Sample Entropy analysis significantly differentiates patients with ischemic stroke of the right hemisphere vs. stroke of the left hemisphere of the brain.