Blocked blood flow from the heart
Introduction
Introduction The blood supply of the heart itself has two notable features: 1. The weight of the heart is less than 1% of the body weight, but it requires 20% of the whole body's blood to satisfy the blood supply of the heart. 2. In order to meet the special needs of blood supply to the heart, the human body also forms a blood supply system to ensure adequate blood supply. The heart's own blood supply system is the coronary circulation.
Cause
Cause
Most of them cause hyperlipidemia and hypercholesterolemia caused by living factors such as unreasonable diet and exercise. Cholesterol in the blood is divided into high-density lipoprotein cholesterol (referred to as high-density alcohol) and low-density lipoprotein cholesterol (referred to as low-density alcohol). In the blood, in addition to the supply of cells, the excess will deposit on the inner wall of the arterial blood vessels, causing the inner wall of the blood vessel to change from a non-smoothness to the formation of atheromatous plaques, causing the vascular passage to become narrow or even blocked. Therefore, low-density alcohol is a nociceptive cholesterol. The high-density alcohol will bring the blood cholesterol to the liver, transform it, and then excreted through the gallbladder into the intestine, which is protective cholesterol.
In addition, high age, high blood pressure, diabetes, obesity, mood swings, alcohol and tobacco hobbies, and adverse reactions caused by certain drugs can cause vascular changes leading to myocardial ischemia and intravascular thrombosis.
Examine
an examination
Related inspection
Ultrasound diagnosis of cardiac output (CO) Doppler echocardiography cardiovascular disease
Insufficient blood supply to the heart affects heart function, and a severe decline in heart function affects the blood supply to the body, including blood supply to the brain. Specific phenomena include physical decline, decreased immunity, and less cerebral blood supply, which can cause dizziness and confusion (if it is a standing position, it is easy to fall and fall).
Diagnosis
Differential diagnosis
Increased cardiac output: cardiac dysfunction is defined as cardiac dysfunction caused by different causes, and the development of cardiac output can not meet the needs of systemic metabolism for blood flow when circulating blood volume and vasomotor function are normal. , resulting in a clinical syndrome characterized by both abnormalities in blood flow and activation of the neurohormonal system. The main clinical manifestation was "congestion", followed by insufficient perfusion of surrounding tissue.
Decreased cardiac output: In a quiet state, the normal left ventricular end-diastolic volume of normal adults is about 125ml, and the end-systolic volume is about 55ml. The difference between the two is the stroke volume, which is 70ml. It can be seen that the ventricle does not completely discharge the blood filled in the heart chamber every time the blood is injected. The percentage of stroke volume to the end-diastolic volume of the ventricle is called the ejection fraction. A decrease in cardiac output can lead to shock.
Obstruction of superior vena cava obstruction: Superior vena cava obstruction syndrome is a syndrome in which complete or incomplete superior vena cava obstruction is caused by various causes, which hinders blood flow. The clinical manifestations were mainly upper limb and facial edema and cyanosis, and varicose veins of the chest wall. Most of the causes of obstruction of the superior vena cava are mediastinal or hilar tumors and mediastinal inflammation. A small number is due to superior vena cava thrombophlebitis.
Insufficient blood supply to the heart affects heart function, and a severe decline in heart function affects the blood supply to the body, including blood supply to the brain. Specific phenomena include physical decline, decreased immunity, and less cerebral blood supply, which can cause dizziness and confusion (if it is a standing position, it is easy to fall and fall).
