CHAPTER 2
ECG SIGNAL RECORDING AND PREPROCESSING USING LABVIEW
2.1 INTRODUCTION
ECG activity is recorded on graph sheets or monitors by placing the electrodes on specific locations of the body of a person. The record shows a series of electrical waves that occurs during each beat of the heart. The recorded waves have peaks and valleys and normally represented by P, Q, R, S and T waves. These human ECG signals have very low amplitude in the mV range and the frequency range is 0.05–100 Hz and most of the useful information contained in the range of 0.5–45 Hz (Wiggins et al 2008). Real time monitoring plays an important role in biomedical signal processing, such as ECG, EMG, EEG etc. Personal computers have become a standard platform
…show more content…
Since DAQ device acquire electrical signals, a transducer has to convert some physical phenomenon into an electrical signal. These signals can either intelligently control systems or provide a stimulus so that the DAQ can estimate the output. DAQ-STC includes a total of seven 24-bit and three 16-bit counters and a maximum timing resolution of 50ns. The DAQ-STC provides buffered pulse generation, equivalent time sampling and seamless changing of the sampling rate. PC based data acquisition offers users the flexibility to develop control and measurement solutions for any …show more content…
It can measure the frequency components within the signal. FFT-based measurement requires digitization of a continuous signal. According to the Nyquist criterion, the sampling frequency Fs must be at least twice the maximum frequency component in the signal. If this criterion is violated, a phenomenon known as aliasing occurs. When the Nyquist criterion is violated, frequency components above half the sampling frequency appear as frequency components below half the sampling frequency, resulting in an erroneous representation of the signal. This is called frequency aliasing. Therefore, before a signal is digitized, anti-aliasing filters are used to attenuate the frequency components at and above half the sampling frequency to a level below the dynamic range of the analog-to-digital converter
The filtered digital signal will then be converted to analog
Works Cited Broida, Rick. “Does it still make sense to build your own computer?” C Net. C Net, 13 May 2013. Web.
The introduction of personal computers in the 1980s and 1990s revolutionized the way that people worked and communicated, allowing for greater efficiency and productivity. The widespread adoption of personal computers during this time period led to the creation of new industries such as software development and computer
Halloween, donating blood or suffering from a cut, you probably don't give much thought to blood on a regular basis. This fluid that flows through our bodies, though, is truly a matter of life and death. In honor of American Heart Month, let's learn a little bit more about the blood that our hearts pump through our bodies. Blood is composed of cells and plasma.
Then that selected range is converted from analog to digital samples. The DSP processor has a definite program according to different modes selected from the switch. There are 3 modes with which we can use this device. E. Simulation: 1. Mode 1: Stress removal
Supraventricular Tachycardia Narrow complex tachycardias are defined by the presence in the electrocardiogram of a QRS complex with less than 120 msec duration and a heart rate more than 100 beats per minute. They are usually of supraventricular origin, though narrow complex ventricular tachycardias were rarely reported in the literature (Hayes et al, 1991). Supraventricular origin of the tachycardia means the obligatory involvement of one or more of the cardiac structures above bifurcation of His bundle. Those include the atrial myocardium, the AV node, the proximal His bundle, the coronary sinus, the pulmonary veins, the venae cavae, or abnormal atrio-ventricular connections, namely bypass tracts (Lau, 2008). Although pharmacologic treatment is still in use for suppression and treatment of SVTs, particularly for atrial arrhythmias, reported efficacy and side effects limited their application.
The Tell-Tale Heart: Analysis Poe is best known as the author of horror and suspense. The dark- gothic element that surrounds his stories is enhanced even more with the appearance of multi-complex personalities which ‘move between the edge’ of normal and abnormal. One of his characters that represent this notion is the narrator and main character of his well-known story the “Tell-Tale Heart”. His psychological complexity and his narrative technique immediately captivates the audience attention who ‘struggles’ to come to some conclusion about the narrator’s state of mind. The narrator’s psychological instability is visible through the tone, the syntax and the constant alleviation between sanity and insanity.
my argument is that yes they should teach the tell tale heart to 8th graders.so here are some of my reasons to why I think that they should teach the tell tale heart. so here are my reasons .isay we should teach the tell tal heart because 8th grade like the genra horror .also because the tell tale heart makes for a good debate during class i know this because my class and other classes had a good debate. here are some reasons why some people might say that it should not be taught.first b ecause it is about horror and it has fowl language (line 99 ) .they also might say it because it is about a person who kills someone becasue of the persons eye .
sudden cardiac arrest is when the heart suddenly stops beating. Blodd stops flowing to the brain and other organs. Sudden cardiac arrest (SCA) causes death if not treated in minutes. The most common cause is an arythmia which is when rapid pulses causes your ventricles to quiver instead of pumping blood. Usually a life threatning arythima develops in a Person with a pre-existing heart condition such as: coronary artery disease, heart attack, or electrical problems in the heart.
The research methods were divided into four tasks which focused on student opinions on the “Windows vs. Apple” debate, and how universities could close the gap on those needs in an affordable manner. The survey which can be found in the Appendix along with sources which studied the changes made at Bemidji and Wilkes were used as the primary sources, while sources comparing the two platforms and the opinions of students across the country were used as the secondary sources. Task 1: Understand which platform students prefer between Apple and Windows and how large the disparity is. Determining the students’ preferences was imperative in order to establish any further case for reviewing the current computing situation. This was done by completing
Pathophysiology: Increased bone resorption or decreased bone, aging because of decreasing supply of osteoblasts, estrogen deficiency, Calcium deficiency, Vitamin D deficiency, Bone fractures, Etiology: Low peak bone mass, being a women, smaller body frame size, lowered sex hormones, excess thyroid, low calcium intake, eating disorders, sedentary lifestyle, excessive alcohol consumption, tobacco use. Manifestations: Back pain, loss of height, stooped posture, bone fractures occur easily. Possible complications: Bone fractures in spine or hip. Treatments: Walking, & Medication Pathophysiology: Vitamin D deficiency, hypocalcaemia, renal phosphorus loss, decreased calcium in bone, calcification of osteoid.
In the image I created did you can see the main characters from when calls the heart Elizabeth Thatcher, Jack Thornton, Abigail Stanton, and Bill Avery. By adding the main characters to the image I wanted to create a sense of human connection as most often the audience tries to connect with the characters in someway. We tend to connect or find characteristics that remind us of ourselves, which result in us creating a deeper understanding and connection to the characters. When calls the heart is a family friendly show that teaches and talks about moral and important life stories throughout each episode. It creates a show that discusses realistic problems we face every day.
A lot of people love sugary foods and drinks. This experiment can be applied to the real world because it shows how something so delicious can affect our overall health exceedingly. Since sugar affects our heart rate and blood pressure in different ways in many peculiar people, there are contrasting affects that can happen to people. For example, sugar can make the human body 's pulse and blood pressure increase or decrease. Both ways can be risky for your health.
In this regard, cardiovascular response to exercise occurs with changes in heart rate, cardiac output, stroke volume, peripheral vascular resistance and blood pressure/arterial pressure,
A computer has already become an inseparable part of life. It helps a doctor in his diagnosis; it helps an engineer in his multifarious activities; guides a pilot or a navigator to safety; it helps a public or a private official or businessman in more ways than one. It is an important part of every institution, every office and every establishment public or private in several countries. Accept it or not, the computer has invaded the work place.