|
|
Influence of postural change to the pulse wave velocity in the upper limb
Sakmárová, Klára ; Hrušková, Jana (referee) ; Svačinová, Jana (advisor)
This thesis is devoted to the topic of pulse wave velocity in the upper limb based on changes in body position. The work includes a literature search from the mentioned area, where it focuses mainly on the cardiovascular system, the pulse wave, its propagation in the human body, the clinical significance of the pulse wave and the factors that affect it. Pulse wave examination has now become an important part of the preclinical diagnosis of atherosclerosis or arterial stiffness. Examination of the pulse wave velocity as well as examination of the vascular system as part of early diagnosis is highly desirable for the stratification of cardiovascular diseases and subsequent mortality. In this work we will evaluate the speed of the pulse wave based on the time distance between the oscillation R on the ECG and the passage of the pulse wave under the pressure sensor located on the finger. In the MATLAB, a software solution of selected procedures for ECG measurement and blood pressure recording heart rate after heart rate is made. The measured values on a group of volunteers are statistically processed and subsequently discussed.
|
|
|
Automatic determination of the pulse wave velocity in a body segment
Kampo, Dávid ; Svačinová, Jana (referee) ; Vondra, Vlastimil (advisor)
This Bachelor´s thesis deals with a propagation of a pulse wave velocity in different body segments and its measurement through bioimpedance. In connection with this topic, the work includes a profound description of a pulse wave and its velocity in regards to diagnostics and prevention of cardiovascular diseases that have been prevailing in recent years. During the process of determination of PWV, ECG is recorded, as it helps to accurately estimate the relevant transition times and the reulting PWV. The main purpose of this work is to validate that PWV can be determined without supportive ECG signals, what as a result makes the whole process simpler, more effective and available. The main target of this work has been successfully achieved and the algorithm for an evaluation of transition times and determination of PWV is described in the work. Moreover, the algorithm is implied to the structure of GUI in Matlab programm where the interface has been designed to suit the user´s needs to analyse PWV. Highlighting the validation process and functionality of the algorithm, signals from 21 subjects have been used to assess some of the most frequent analysed PWVs and all average values of velocities are within a physiological range from 5 m/s to 15 m/s. cfPWV is considered as a golden standard when it comes to PWV and the average value for all 21 subjects has been estimated to 7,54 m/s what corresponds with values from scientific studies that have been assessing cfPWV.
|
|
|
Influence of postural change to the pulse wave velocity in the upper limb
Sakmárová, Klára ; Hrušková, Jana (referee) ; Svačinová, Jana (advisor)
This thesis is devoted to the topic of pulse wave velocity in the upper limb based on changes in body position. The work includes a literature search from the mentioned area, where it focuses mainly on the cardiovascular system, the pulse wave, its propagation in the human body, the clinical significance of the pulse wave and the factors that affect it. Pulse wave examination has now become an important part of the preclinical diagnosis of atherosclerosis or arterial stiffness. Examination of the pulse wave velocity as well as examination of the vascular system as part of early diagnosis is highly desirable for the stratification of cardiovascular diseases and subsequent mortality. In this work we will evaluate the speed of the pulse wave based on the time distance between the oscillation R on the ECG and the passage of the pulse wave under the pressure sensor located on the finger. In the MATLAB, a software solution of selected procedures for ECG measurement and blood pressure recording heart rate after heart rate is made. The measured values on a group of volunteers are statistically processed and subsequently discussed.
|
|
|
Automatic determination of the pulse wave velocity in a body segment
Kampo, Dávid ; Svačinová, Jana (referee) ; Vondra, Vlastimil (advisor)
This Bachelor´s thesis deals with a propagation of a pulse wave velocity in different body segments and its measurement through bioimpedance. In connection with this topic, the work includes a profound description of a pulse wave and its velocity in regards to diagnostics and prevention of cardiovascular diseases that have been prevailing in recent years. During the process of determination of PWV, ECG is recorded, as it helps to accurately estimate the relevant transition times and the reulting PWV. The main purpose of this work is to validate that PWV can be determined without supportive ECG signals, what as a result makes the whole process simpler, more effective and available. The main target of this work has been successfully achieved and the algorithm for an evaluation of transition times and determination of PWV is described in the work. Moreover, the algorithm is implied to the structure of GUI in Matlab programm where the interface has been designed to suit the user´s needs to analyse PWV. Highlighting the validation process and functionality of the algorithm, signals from 21 subjects have been used to assess some of the most frequent analysed PWVs and all average values of velocities are within a physiological range from 5 m/s to 15 m/s. cfPWV is considered as a golden standard when it comes to PWV and the average value for all 21 subjects has been estimated to 7,54 m/s what corresponds with values from scientific studies that have been assessing cfPWV.
|
guest ::
