Essays on Pacemaker

English

There are so many airports globally, that handle a large number of people than any mode of transport. Air transport has enabled the economic growth to most of these countries. They also operate at all times of the day yearly. There are several security measures in airports which have been there since long time ago. With the current revolution in technology all over the world, I personally agree that airport security should be increased. Comparing the rate of people traveling nowadays and a long time ago, the number has greatly increased as well as the number of airlines ("Global ...

Where are the normal pacemaker and the backup pacemaker of the heart located?

Answer: The normal pacemaker of the heart is known as Sino- atrial (SA node) which is located in the right atrium of the heart, whereas, the backup pacemaker of the heart is known as Atrio- ventricular and it is situated in the centre of the heart along the right atrim (AV node) (Rhodes, 2008).

Why does this patient have a bradycardia?

Answer: The patient has bradycardia as a result of occlusion in the right coronary artery (Serrano Jr et al., 1999). Infarction in the right coronary artery is known to give rise to bradycardia.

What parts of the heart have the fastest and slowest conduction velocities?

Answer: The Purkinje fibres have the fastest conduction velocities whereas the AV ...

Abstract

Heart failure (2.6% prevalent worldwide) is a complex clinical syndrome, resulting from a structural or functional cardiac disorder and impairing ventricular filling or ejection capability. The current case of a 59-year-old male patient admitted on August 18, 2016 due to worsening shortness of breath and bilateral left extremity edema (one week) involved an existing diabetes mellitus type 2 (DM2). Physical and clinical profiles indicate a comorbidity between heart failure (HF) and DM2. Laboratory and imaging findings were not indicated, while diagnosis was based on the NYHA Classification guidelines. A review of literature revealed three crucial weaknesses in the diagnosis. ...

Human Physiology ECG Laboratory Report

Abstract This is a practical experiment on ECG concerning human physiology. The experiment intends to achieve one primary goal: equip the learner with vital skills pertinent in making rational decisions anchored on scientifically proven facts. I chose to study participants from both sexes with varying levels of nutritional statuses and physical activities. We recorded the foods consumed by each participant. The results indicated that those who took caffeinated drinks positively correlated to emission of rapid ECG signals demonistrated by the ECG readings.

Introduction

The heart is a fundamental organ in sustaining life. It contracts at regular and perpetual intervals throughout ...

Abstract

This is a practical experiment on ECG with regards to human physiology. The experiment was intended to achieve one primary goal: equip the learner with vital skills pertinent in making rational decisions anchored on scientifically proven facts. The alchemist recruited study participant from both sexes with varying levels of nutritional statuses and physical activities. The foods consumed by each participant were recorded. The results indicated that those who took caffeinated drinks positively correlated to emission of rapid ECG signals demonistrated by the ECG readings.

Introduction

The heart is a fundamental organ in sustaining life. It contracts at regular and perpetual ...

DISCUSS THE ROLE OF ION CURRENTS IN DETERMINING THE SHAPE AND DURATION OF CARDIAC ACTION POTENTIAL

Introduction Selective permeability to various ions is an important characteristic of cell membranes, one that determines myriad cellular functions. In animal cells, ion permeability and the electrical potential generated thereof determines the activity of neurons, myocytes and the like. The electrical potential depends on the concentration of the ions inside and outside any given cell, the permeability of the cell membrane to the ions and the ion channels that are present on the surface of the cell. Cardiac cells also possess different ion channels on their surface. These determine the two types of electrical potentials, namely, resting membrane ...

Health disparity is one of the biggest challenges facing the healthcare system. WHO stipulates that healthcare should be affordable available and accessible to all individuals disregarding their social status, age, sex, ethnicity, race, disability or sexual orientation. Centre for Disease Control and Prevention concurs with WHO but states that, despite the efforts to make health for all a reality, many socially disadvantaged population groups cannot still access healthcare services, or if they can, they receive a lesser healthcare service compared to the general population. I have experienced many situations of health disparities, but one that caught my most attention involved an ...

Biomimicry, whose name truly makes an interpretation of Greek to 'impersonation of life,' depends on a basic thought: people can enormously advantage by mimicking the common procedures found in science and topography (Gamage and Hyde, 2012). This is not another thought; horticulture, training of creatures and populace settlement in light of topography all show that people and their environment have shared a profound beneficial interaction. (Gamage and Hyde, 2012). Presently, as science upgrades our ability to better comprehend the Earth consistently, we too are finding creative approaches to consolidate these discoveries into our lives. Apparently the most earth shattering ...

The cell phone is undeniably a great technological innovation of the twenty first century. It started off as an expensive gadget used by security agencies, government agencies and members of the high society. Gradually, the cell phone became a very important tool of communication especially in business. For quite sometime, the cell phone remained a symbol of status and not many people talked about the possible hazards posed by its continued use. The few members of the society fortunate enough to own a cell phone continued to use the device oblivious of the dangers they got exposed to. As the cell phone grew ...

Best phrase that anticipates a new discovery is not "Eureka!" but "Wow, cool!"

Throughout the history of science, many discoveries have been made by accident. Sometimes the researcher saw the potential in a completely irrelevant things, or even in the remnants of a failed experiment, making a mistake a manifestation of intuition. Other discoveries took place after a period of despair that engulfed the scientist following a failed experiment. As a result of an error or "unfortunate" coincidence of circumstances, there appeared not a single discovery, but a large set of findings, ideas and discoveries in various fields of science Penicillin. The penicillin was discovered in 1928. The author of the accidental invention was Alexander Fleming, who, at the time, ...

It was originally thought that basal ganglia were responsible for voluntary motor movements, and movement disorders were associated with pathological changes in the basal ganglia. However, it was found that the basal ganglia are associated with different cortexes with distinctive circuits, which are called loops, so a pathological transformation of tissue can manifest as a psychological or motor disorder, depending on the loop affected. The cortico-basal ganglia-thalamocortical loop is a one-way circuit that allows the basal ganglia to receive input from the cortex and send output via the thalamus back to different regions of the cortex. Pathological changes in this loop are ...

Sole Remaining Supplier

Sole Remaining Supplier

Key Utilitarian Ethical Problems

The key utilitarian ethical problems that confront the supplier transistor company in the case is one where the supplier had to choose between ensuring its own good or the greater good. On one hand, the supplier had to protect the company by ensuring that it does not become liable in any way for any problems that may arise from the development or use of defective pacemakers (Shanks, 1996), especially considering that many people were dying from their use at the time. On the other hand, though, if they stopped supplying transistors to the pacemaker company then ...

Technological advancements result in both benefits and harmful risks to human populations. One such advancement is the introduction of mobile phones in the society. Before the cell phone age (before 2000), telephones were common and were used in every business and social setting. Cell phones are mobile phones designed for mobility, have small sizes, and have advanced features such as camera and internet services (Schuz et al., 2006). Popularity of cell phones has surged since the turn of the new millennium. The reasons are listed by Schuz et al. (2006) as due to; advanced features such as cameras and ...

1.0 Biological Pacemaker

Pacemakers are electronic devices implanted in individuals with bradyarrhythmias (abnormal heart rhythms) to monitor and regulate heart muscle contractions. Biological pacemakers have been developed that will involve the injection of pacemaker genes from stem cells into damaged heart tissues to restore normal function and heart rhythm. The biological pacemakers are designed to down regulate the expression of the hyperpolarization activated cyclic nucleotide gated (HCN2) channels and the potassium current as well as up regulating the β2 adrenergic receptors. The adoption of biological pacemakers over the electronic pacemakers offers various advantages. Electronic pacemakers require battery powering and maintenance while the ...