Bio Modeling And Stress Analysis Essay

The Science of Stress is an informative video by National Geographic detailing the body response to stress. Stress is the body’s way of getting itself prepared to face a challenge. It is constant problem that everyone has to deal with. It was originally meant to aid our survival, but over time it has become dangerous and lethal to our well being. National Geographic’s video gives us a scientific view of what goes on in our bodies when experiencing stress and its effects on it.

This assignment will explore the concept of stress by firstly distinguishing between the definitions set out by Selye 919560 and Cox (1976). Following this assignment will critically evaluate the General Adaption Syndrome, SRRS and Daily Hassles explanations of stress and finally, conclude with a discussion on individual differences based on Friedman and Rosenman’s research.

“Stress is a state of mental or emotional strain or tension resulting from adverse or demanding circumstances”. It is generally known as “pattern of disruptive physiological and psychological reaction to events that threaten the ability to cope” (Oxford Living Dictionaries, 2017).

There are many different broad definitions of stress and how to cope with it, known as stress management.

1). Chest X-ray was normal. Initial laboratory studies were remarkable for white blood cells count of 12.1K, a creatine kinase MB fraction of < 3 mm was associated with significant reductions in restenosis and the rate of target vessel revascularization19. In SES-SMART trial patients were randomly assigned to receive a Sirolimus-eluting or bare-metal stent in small coronary artery. Sirolimus stent was associated with significant reductions in the rates of angiographic restenosis (primary outcome), target lesion revascularization and MI at 8 months20. The composite clinical endpoint ( death, non-fatal MI, ischemia- driven target lesion revascularization, and cerebrovascular accidents) was significantly lower with the sirolimus-eluting stent21. In the TAXUS V trial, in the subset of patients with small coronary arteries, the paclitaxel stent was associated with significant reductions in angiographic restenosis and target lesion revascularization at nine months compared to bare metal stents22. Although DES improves target lesion revascularization rates compared to bare-metal stents in small vessels, the absolute rates are still higher in small vessels than large

The coronary arteries supply oxygenated blood to the heart muscle. Plaque is a substance that can clog these arteries and cause a condition called atherosclerosis. The buildup of plaque can occur over many years which can ultimately lead to coronary heart disease (CHD). Plaque can harden and cause the arteries to become narrowed. This reduces the flow of oxygenated blood. Plaque may also burst and a blood clot may form causing a blockage of blood flow to the heart. In result to the blockage angina or a myocardium infarction can occur.

A few of stents are the Leo, Enterprise, and the Solitaire AB Stent. Leo stents are retrievable but they are prone to shift when they are in mid release state (Cui, Y., Xu, H., Liu, H., & Wang, Y. (2015). Enterprise stents can only be recovered once, and it’s only when they haven’t been released over 70 percent. The Solitaire AB Stent can be recovered a number of times. This is the main advantage of the Solitaire AB stent over other stents. The release technique is also different with the Solitaire AB stent. The stent is released from distal end and only after the position is determined; it also has a single open end which is different than the Leo and

ical and technical descriptions of invasive modalities that are abling the physician to visualize or study the core elements of a plaque by penetrating the arteries for that purpose.

A stent placement is a metal mesh tube, when inserted it is compressed within a catheter and expands to form a supportive

Once a good position was confirmed, balloon angioplasty was carried out x 1. Conduit angiogram shows improved flow within the LPA stent. However, no significant improving was noticed in the narrowed conduit. Therefore, a Rosen guide wire was exchanged by a 0.35 Amplatz Super Stiff Wire to facilitate stenting of the RV-PA conduit. A pre-mounted 10 mm x 26 mm Valeo stent was tracked over a 0.35 Amplatz Supper Stiff Wire. Once the appropriate position was confirmed, the stent was deployed in the RV-PA conduit. Subsequent pressure measurement revealed improved in the RV pressure ( RV pressure ½ systemic from ¾ systemic). Conduit angiogram was carried out through the long sheath which shows satisfactory position of the stent with good flow in the conduit, RPA, and LPA and no extravasation or stent fracture was

The stent will be placed where it can be expanded to hold the artery open. Some stents are designed to simply keep the artery held open. Other stents used are drug-eluting stents. These stents are coated with pharmacologic agents that work to prevent restenosis of the artery.

appear similar to conventional stents.”8 Middleton, Teefey and Darcy8 note that the use of PFTE endografts will likely become standard as their performance outweighs the early stent materials used. Color Doppler as well as pulsed Doppler should be used to interrogate the stent and supporting vessels. Velocity measurements are taken using angle correct and spectral waveforms are recorded. Careful examination of the liver vasculature is imperative to verify proper stent function. Specifically, thrombosis or occlusion can be assessed with color and Doppler ultrasound. Velocity parameters may vary from patient to patient and also will change from immediate post procedure velocities to those obtained during long term follow up. Universal Doppler

Besides echocardiography, cardiac magnetic resonance (CMR) and Multi-slice computed tomography angiocardiography (MSCT) have gained particular importance. (8) The presence of image degrading artifacts from implanted metal, such as intravascular stents and embolization coils; higher cost; limited availability; contraindication in imaging of

Psychological and physical well-being and the overall quality of life are under a constant threat of stress and thus, psychological and medical sciences have long been concerned with studying stress response. Cox (1979) claimed that because of the poor understanding and defining it, the concept of stress tends to be rather elusive. The term, “stress”, commonly describes any physchological or physical alteration that deranges the organism’s homeostasis (or balance). This essay reviews some of the biological factors involved in stress and it has been organized in the following way. The paper begins by briefly introducing the concept of stress. It will then go on to discus and describe the automatic response (fight or flight reaction),

Response of Blood Flow through Stenotic Artery with variable Viscosity- A Non-Newtonian Fluid Model A Dissertation report submitted for the partial fulfillment of the award of degree of Master of Science In Mathematics Submitted By Shailja Gautam ROLL NO. 115258