In the year 2000 it was estimated that about 25 percent of people worldwide had hypertension and this number is expected to keep rising further increasing the risk for millions in developing cardiovascular disease. There are two main types of hypertension. Secondary hypertension is caused from an underlying disease in the adrenal or renal systems or by use of certain medications. It is resolved when the cause is treated or removed. Primary or essential hypertension is the most common type with the cause being unclear although the incidence is higher with age and weight.
Pathophysiology
The amount of blood the heart pumps and the amount of resistance the arteries have to blood flow determines the blood pressure. High blood pressure
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Although both of these readings are important after the age of 60 the systolic reading is more significant due to the association with cardiovascular disease. Two to three blood pressure readings will be taken at separate appointments before a diagnosis of hypertension can be determined.
Although the causes of essential hypertension are unclear a number of factors have been known to increase blood pressure. Changes either from genes, behavioral, or the environment which disrupt the normal functions of the body may cause a rise in blood pressure. Other factors that increase blood pressure are kidney fluid and salt balances, the renin-angiotensin-aldosterone system, sympathetic nervous system activity, and blood vessel structure and function (Bolivar, 2013). Since blood pressure homeostasis is accomplished by multifactorial mechanisms if there is a change in one of these mechanisms another attempts to correct this change in order to maintain a normal blood pressure. When this system fails and blood pressure can no longer be normalized by this method than essential hypertension results.
The kidneys regulate the body’s salt balance by retaining sodium and water while excreting potassium. Any imbalance in the kidneys function will expand blood volumes causing blood pressure to rise. The renin-angiotension-aldosterone
As the blood is forced throughout our body, there is a pressure that is exerted on the walls of our arteries, this is known as blood pressure. We see blood pressure represented as two numbers, the systolic (top) and the diastolic (bottom) numbers. The systolic blood pressure is the heart contracting and the diastolic is the heart relaxing. A normal, healthy, blood pressure would be written as 120/80 mmHg (millimeters of mercury) or verbally expressed by most individuals as 120 over 80. Our blood pressure can vary depending on many things. When the diastolic or systolic pressure is high, or significantly and consistently above 120/80 mmHg, this is what we call hypertension. There are different stages or degrees of hypertension. Lippincott Williams and Wilkins (2010) describes the stages as the following:
Hypertension is a very common problem, affecting 1 billion people worldwide, with 50 million cases in the United States, and one third of cases going undiagnosed. 1% of the cases will experience a hypertensive emergency in their life. (1,2)
There is a complex interrelationship among the cardiovascular system, the central nervous system (Na+, appetite and thirst regulation), the kidneys, and the tissue capillary beds distribution of extracellular fluid volume). Any change at any of these sites affects the function at other sites. There is a basic law of kidneys that Na+ excretion is directly proportional to mean arterial blood pressure (MABP). A marginal increase in MABP causes significant increase in Na+ excretion.
Hypertension, also known as high blood pressure, has become a major risk factor for several types of heart disease across the globe. In the United States alone, nearly 70 million adults have been diagnosed with this condition [1]. Hypertension is a condition in which arterial walls experience extreme force from blood flowing through; long-term force against artery walls will lead to more serious health problems such as stroke, renal failure, and other cardiovascular diseases [2]. If the proper steps to treat hypertension are not taken, patients have a high risk of developing atherosclerosis, a condition that causes arteries to harden significantly. Smoking, obesity, lack of physical activity, high alcohol consumption, and high sodium intake are factors that may cause an individual to be diagnosed with hypertension [3] Detection of hypertension is crucial in order to reduce the incidence of death by cardiovascular disease [1].
The major health problem selected for this project was hypertension (Harrison et al, 2011). It is identified as a cardio vascular disease risk factor such as dementia, chronic kidney disease, coronary heart disease, and stroke (NICE, 2011). It can be missed easily, as in various instances it is asymptomatic as well as it is also known as a silent killer. The Hypertension is thought to be a disease of vascular regulation ensuing from arterial pressure control mechanisms malfunction (extracellular fluid volume, rennin-angiotensin-aldosterone system, and CNS) that results in elevation of BP by means of enhanced peripheral vascular resistance, and cardiac output. There are 2 basic hypertension types. Around 90 to 95 percent of the individuals have primary hypertension which is linked with change in lifestyle as well as needs medical treatment. On the other hand, 5-10% has secondary hypertension which is linked with various other diseases for instance pregnancy, thyroid, and renal (Haslam and James, 2005). It is estimated that around 1 in 20 adults will have increased BP of 160/100 mmHg and above that results in either more than one predisposing aspects (Gemmell et al, 2006).
If diabetes is not diagnosed at an early stage, individuals will not notice the presence of the symptoms until they experience trouble with their heart, brain, kidney, and etc. Therefore, it is always best to speak to a health care provider or ones doctor regarding hypertension. In 2009, Americans visited their health care providers more than 55 million times to treat their high blood pressure. (Roger, Lloyd-Jones, 2012). One can also prevent the risk of hypertension by exercising regular, maintaining a healthy body weight, and avoiding heavy salt intake and excess alcohol use. Treatment is also available for hypertension. Various drugs like diuretics which work on the kidney to flush out excess water and salt from one’s body, beta and
The pathophysiology of hypertension (HTN) is best explained clearly if you have an understanding of how blood pressure (BP) works in the body. BP is seen as the function of both cardiac output (CO) in the human system and systemic vascular resistance (SVR). Cardiac output (CO) is made up of both heart rate (HR) and stroke volume (SV). SV in turn depends on contractility and preload of the system. SVR relies on contractility and afterload. There is literature that supports molecular and cellular levels relating to effects on blood pressure in terms of genetic make-up. Changes in any of these processes have the ability to alter CO or SVR, causing BP alteration and HTN.
Hypertension is sometimes referred to as the silent killer (Aycock, Kirkendoll, & Gordon, 2013). Today it is a public health problem. According to the American Heart Association 2013 Statistical Fact Sheet (2013), one out of every three adults has high blood pressure, which is estimated at 77.9 million people (AHA, 2013). High blood pressure is also referred to as hypertension. Hypertension is a prevalent medical condition that carries with it the risk factor for increased chances of heart disease and stroke (Gillespie & Hurvitz, 2013). Hypertension remains one of the top 10 causes of worldwide disability-adjusted life years (as cited in Drenjančević-Perić et al., 2011). For the estimated 348, 102 deaths in 2009, high blood pressure was listed as the primary or contributing cause of death (AHA, 2013). Despite the health risk associated with hypertension, the diagnoses of high blood pressure continue to rise. By 2030, hypertension is expected to increase by 7.2% from 2013 estimates (AHA, 2013).
Pre-hypertension is 120 to 139 systolic or top number blood pressure, 80 to 89 diastolic or bottom number of blood pressure 3. Hypertension is characterized as anything over 144 systolic and anything over 90 diastolic III. Blood pressure basics A. The body 1. In order to survive and function properly, your tissues and organs need oxygenated blood that your cardiovascular system provides, when heart pumps it pushes blood though network of vessels 2.
Hypertension is a common health problem especially among people over age of 60 years. This disease is diagnostic when a patient blood pressure is more than 140 to 159 over 90 to 99. Blood pressure refers to the pressure that blood applies to the inner walls of the Diabetes is an endocrine system disorder that occurs when the body is unable to control or balance the amount of sugar in blood and within bodily tissues. You know that the human body is like a machine, with organ systems that are specialized in certain functions, and interact with each other to allow all vital functions to happen. For the body to stay healthy, it is essential that its internal environment is stable and balanced despite the different changes that can occur inside
In other words, what are the causes of hypertension? Blood pressure lowers and rises regularly during the day. It lowers during times of rest and rises upon awakening. It also rises during times of excitement, anxiety and physical activity. The main causes and risk factors are that of age, race, size, sex, and lifestyle choice. Within the risk of age, everyone is at a greater risk of high blood pressure as they grow older. African-American adults are at greater risk that those of other races and the males are at higher risk at a younger age. The women are more at risk as they get older. Those people who eat salt-rich and fatty food and use alcohol and tobacco are at risk for hypertension as
Blood pressure readings have two numbers. The first number is your systolic pressure. Systolic pressure measures the force of blood against your artery walls as the blood is pumped out of your heart to the rest of your body. The second number measures your diastolic pressure. Diastolic pressure measures the force of your blood against your artery walls between heartbeats.
Hypertension is a chronic condition that affects an immense amount of people across different ages, genders, ethnicities, and health statuses. With 65 million diagnosed individuals in the US, it is the most common patient motivation to visit a physician and accounts for the largest number of prescriptions written in the country.1,2 Risk factors for disease development include unpreventable circumstances such as age and genetics in addition to modifiable behaviors such as obesity, dietary sodium intake, and physical inactivity.2 Attributing a single causative agent to hypertension poses a challenge as arterial pressure is a stem from which multiple physiologic functions and systems branch. While most documented cases (more than 95%) are
Basically, arterial blood pressure (BP) is directly proportional to the product of blood flow (cardiac output, CO) and the resistance to passage of blood through pre-capillary arterioles (peripheral vascular resistance, PVR) Hypertension can be caused by either an increase in Cardiac Output (CO) or by an increase in Peripheral Resistance (PR)
The two major types of hypertension are primary and secondary. Primary hypertension accounts for more than 90% of all cases and has no known cause, although it is hypothesized that genetic factors, hormonal changes, and the altercations in sympathetic tone all may play a role in its development. Secondary hypertension develops as a consequence of an underlying disease or condition. The prevention and treatment of hypertension is a major public health issue. When blood pressure is controlled, cardiovascular, renal disease, and stroke may be prevented. The JCN, reported more than 122 million individuals in American are overweight or obese, consume large amounts of dietary sodium and alcohol, and do not eat adequate amounts of fruits and vegetables; less than 20% exercise regularly. Both modifiable and non-modifiable factors play a role in the development of hypertension