Browse Tag: Heart

Dangers of hypertension

Dangers of hypertension
Hypertension is often called. Silent killer. Because it does not produce obvious symptoms before the body has a serious injury. Hypertension if not controlled, it will damage the heart, arteries, kidney and brain. Eyes are also very sensitive to the effects of hypertension. Daily high pressure fluctuations (that is, the blood pressure during the day to be higher than in the evening) are more likely to have other health problems due to high blood pressure.
Studies have shown that people with high blood pressure and without control are about 3 times more likely to have coronary heart disease than those with a normal blood pressure, and 6 times more likely to have congestive heart failure, and 7 times more likely to have a stroke. However, the adverse effects of the discussion in this chapter are not inevitable. You can control your blood pressure by working closely with your doctor to prevent any health problems associated with hypertension.
As an organ that pumps blood to the body, the heart needs to work too much in order to fight blood vessels in order to fight the blood vessels. Like any muscle, when the heart is forced to work harder, the volume of the heart will become larger. The cardiac muscle wall becomes thicker and shorter, and the muscle loses its original elasticity. However, after the heart is enlarged, it is usually not enough to supply a blood supply with oxygen and nutrients. Also the heart increased and then also more easily produce irregular heartbeat. This is called arrhythmias, feel the heartbeat when less.
Left ventricular hypertrophy occurs when the largest Chamber of the heart – the left ventricle is abnormally dilated. As the wall of the ventricle becomes thick, the ventricles become harder to pump blood, which is filled with blood. Pump out of the blood less and less, resulting in breathing difficulties, angina (chest pain), heart palpitations and dizziness. Blood may flow back to the blood vessels in the lungs, causing greater pressure and causing a rapid breathing. If this process continues, and the pressure is very high, it will occur in the case of pulmonary edema, that is, pulmonary water. Pulmonary edema can lead to severe respiratory disease, which belongs to the emergency, if not treated in time may be fatal.
If hypertension is not controlled, the heart function will begin to weaken after many years. When this happens, the blood flow back into the lungs, which makes you feel like you’re in a state of congestion. The weak heart is unable to maintain blood circulation, thereby causing other parts of the body muscles will become weak from severe hypoxia, so it will happen congestive heart failure. People with congestive heart failure in the early stage of the disease has a respiratory problems, development to the late stage of patients with respiratory symptoms. When sitting upright, breathing becomes easier. In addition, there are some groups also have water. This is called edema, edema will cause legs because of too much water and swelling.
In a large study, which began in late 1940s, the Fleming Han heart research program, doctors found that about 40% of men and 60% of women in the case of congestive heart failure were caused by high blood pressure. In patients with congestive heart failure in the study, about 91% of people with hypertension, previously. Men with high blood pressure, the risk of congestive heart failure is about 2 times the normal blood pressure, and women with high blood pressure, the risk of congestive heart failure is about 3 times the normal people. Men with congestive heart failure, only less than 1/4 of people in the disease was diagnosed, the survival of more than 5 years, the survival rate of female patients is less than 1/3.
A coronary artery that supplies oxygen and energy to the heart is also affected by high blood pressure. When coronary artery is not for heart patients provide sufficient oxygen, patients in forced breathing will feel to pain, tightness or our Europe of tightness in the chest, this is angina pectoris. Like congestive heart failure, angina pectoris, early in the disease can feel, and then will be more frequent episodes, even at rest or is in the mood change commanded will occur.

Simple angina does not damage the heart, but it can be a warning sign of a heart attack (see chart below). A heart attack, the pain duration is longer than angina, and usually accompanied by other symptoms, such as nausea and sweating. In the heart attack, because of obstruction in the coronary artery, leading to the local heart blood supply is cut off, and then make this site due to the lack of blood supply and lead to cardiac death. If a large part of the heart is out of blood supply, the heart will stop unless it provides first aid.
Left ventricular hypertrophy can cause angina pectoris. Thickening of the left ventricular muscle will always pressure small blood vessels, small blood vessels were completely flattened until. The results will be caused by the small blood vessels to nourish the organization in a short period of time, thus causing the heart to angina. If hypertension is not always controlled, the left ventricular hypertrophy will further develop into myocardial atrophy (tissue death due to vascular damage), resulting in the loss of part of the heart pump blood function. When the heart can’t promote blood circulation to the body, it will lead to congestive heart failure.

Regulation mechanism of human blood pressure



Regulation mechanism of human blood pressure
In order to understand. Hypertension is a serious health problem, “this concept, you must first be familiar with the concept of blood pressure. This chapter describes how the body regulates blood pressure, why the body regulates blood pressure, and what impact it will have on the system.
The heart and blood vessels in the body cooperate with oxygen and nutrients to the body, and to remove the waste, such as carbon dioxide, which is exhaled when you breathe. Blood is the transmission medium of these substances. Blood pressure is the result of two kinds of forces in the body that produce the opposite effect. One force is produced when the heart pumps blood, and the other is that the blood flow is generated by the arteries that transport oxygen and nutrients to tissues. The pressure produced during the contraction of the heart is called the systolic pressure, and the pressure of the blood on the wall of the heart is called the diastolic pressure. If the pressure from the heart pumps blood or the resistance (or both) is too large, you get high blood pressure.
Blood through the heart of the pump blood function in the body to continue to cycle. The heart pumps the blood to the lungs to carry oxygen, and then the other parts of the body, and then transmitted to the heart through the cardiovascular system. Because the heart and blood vessels are involved in the same cycle, you often hear the name – the cardiovascular system.
Heart to do a small volume (about a clenched fist size) but powerful pump, it makes the blood circulation in the cardiovascular system. It is the most industrious muscle, and it is not the beat of the day and night. The heart beats about 1 times per second, and the total length of the blood pump is 9.6 ~ 16 km long.
The heart is divided into 4 separate chambers, which prevent the blood flow and the mixing of blood between the chambers. The circulation of blood is first received by the first chamber, the right atrium, and once the oxygen of the blood is entered into the atrium, it is pushed into the next chamber of the heart — right ventricle, right ventricle to be. Used in. Blood through the pulmonary artery (the only blood supply of blood in the arteries) directly to the lungs. Lung tissue filters carbon dioxide and provides oxygen for the blood to make it an oxygen rich blood. And then the oxygen enriched blood is returned to the next chamber, left atrium, through the pulmonary veins (the only blood carrying oxygen rich blood). When oxygen enriched blood enters the left atrium, it will be pushed into the final cardiac chamber, left ventricle.
The left ventricle is the main chamber of the heart. As the largest and most powerful heart chamber, the left ventricle will oxygen enriched blood through the body’s largest artery – the great arteries transported to the whole body. Left ventricular work is very hard, so it is about 1.3 cm thick, almost 3 times more than the wall of the right atrium.
Like other organs, the heart also needs oxygen and nutrients to play a role. The heart is supplied with oxygen by the two coronary arteries (left and right) in the large arteries. Used in. Hypoxia blood directly into the right atrium through the coronary veins.
Oxygen enriched blood. Used in. Blood was left and the cardiovascular system was divided into two parts. Arteries send oxygen and nutrients from the heart to the body, while the blood supply to the heart, and the blood flow back to the heart. Microvascular away from the heart, into the tissue in the arteries and veins will be divided into smaller and more fine. The blood from the arteries of the blood vessels is caused by blood from the artery. Capillaries are the smallest blood vessels in the human body, which transport oxygen and nutrients to a single cell and collect the waste products. The lack of oxygen and oxygen rich blood from the blood flow from the capillaries to the micro vein (minimal), and then the blood from here sent back to the heart.
A healthy person’s arteries are strong and elastic. When the heart pumps blood through them, they stretch. In the need to control the flow of blood, the diameter of the artery will change. In order to raise blood pressure, the tiny arteries will shrink and become narrow. You will understand their working principles in the back.