The right coronary supplies the sinoartrial node (SA node) or pacemaker of the heart. When this vessel loses its ability to supply the node, a person usually needs to have a pacemaker placed in their thoracic wall to take the place of the original pacemaker. .
Another important part of the heart are the alveoli. They are the final branches of the respiratory tree and act as the primary gas exchange units of the lung. The gas-blood barrier between the alveolar space and the pulmonary capillaries is extremely thin, allowing for rapid gas exchange. To reach the blood, oxygen must diffuse through the alveolar epithelium, a thin space between the capillary endothelium. The opposite follows the reverse course to reach the alveoli. .
There are so many diseases and malfunctions of the heart. Some that are going to be concentrated on are congenital heart disease, congestive heart failure, and arrhythmias. The first, congenital heart disease (CHD), is the name given to any heart defect or malformation that is present at birth. Most types of CHD involve a deformity within the heart and/or the large blood vessels connected to the heart (e.g., aorta, pulmonary artery). Currently, there are about 35 different types of congenital heart defects. In some patients, the defect or defects may be mild and not noticed right away, but then found later in life. In other children, the effects of the defect(s) are so severe that diagnosis occurs eitehr before birth or around the time that the baby is born. With all the technology today, many babies who are born with congenital heart disease tend to lead a very healthy and normal lives. .
Another disease or malfunction of the heart is, congestive heart failure (CHF), or heart failure, which is a condition in which the heart cannot pump enough blood to the bodies other organs. This can result from several things such as: Narrowed arteries, past heart attack, high blood pressure, heart valve disease, primary disease of the heart muscle itself, heart defects present at birth, or infection of the heart valves and/or heart muscle itself.
The Heart Description: Your heart is about the size of your fist. ... The heart is a muscle; it acts like a small pump. ... The middle of the heart is called myocardium. ... • Coronary Heart Disease: It is the most common heart disease in the US today. ... Sometimes the heart will skip a beat, or it might be a continuous slow or fast heart rate. ...
HEART The human heart is a specialized, four-chambered muscle that maintains BLOOD flow in the CIRCULATORY SYSTEM. ... Since heart attacks are the number-one cause of death in the United States, the heart gets a great deal of attention. ... STRUCTURE AND FUNCTION OF THE HUMAN HEART The heart's wall has three parts. ... The output of the heart is expressed as the amount of blood pumped out of the heart each minute: the heart minute-volume (HMV). ... EVOLUTION OF THE HEART The hearts of primitive vertebrates apparently had only one atrium and one ventricle. ...
Each year thousands of people die from coronary heart disease. ... My husband 34 years of age, nearly died of heart attack. ... There are many factors that lead to heart attack. ... Heart disease is a silent killer. ... Taking care of your self will reduce heart disease. ...
Parasympathetic innervation of the heart originates in the Medulla Oblongata and travels via the Vagus nerve to the heart, where it splits into two sides of innervation. ... Sympathetic innervation of the heart serves to speed up the heart and increase the stroke volume. ... Marey's law of the heart describes the fact that an inverse relationship exists between arterial blood pressure and heart rate. ... If the right side of the heart is suitably distended by and increased pressure the heart elicits a tachycardic response to increase the cardiac output. ... Hypothyroidism has the opposite...
The primary prevention is designed to help patients manage their hearts before a heart attack by eliminating smoking, controlling blood pressure, eating a healthy diet, and exercising. Next, a secondary prevention method helps those already diagnosed with heart problems such as coronary heart disease, cerebrovascular disease, and peripheral vascular disease. ... However, it has been suggested that taking aspirin may reduce the severity of a heart attack and aid in thinning the blood, which could prevent blood clot forming in the arteries of the heart. ... It has been noted that "regular con...
All muscles in the heart require oxygen to operate correctly. ... When the heart cannot get oxygen, the heart muscle is damaged and heart attacks occur. A heart attack is also known as a myocardial infraction. ... He can also view the performance of the heart and its valves. ... The patient must not strain the heart in any strenuous activities. ...
Heart Attacks Heart attacks are the leading cause of death in the United States. Heart attacks are caused by blockage in the arteries that carry blood to parts of the heart. ... If a small part of the heart dies, the heart can remain alive without it. But if a big part of the heart dies, it can cause death. ... Heart attacks can also be due to a blood clot. ...
The average heart rate was 55.5 beats per minute. ... The body needs to maintain a constant cardiac output, which is the stoke volume, the volume of blood out each time the heart beats, multiplied by the heart rate, the number of times the heart beats per minute. ... Therefore stroke volume and heart rate should be low. ... This increases the physical activity will mean that the heart will beat faster to supply the respiring cell with oxygen thus increasing heart rate. ... This may be because the subject is quite a fit person, so therefore has a low heart rate, as his/her heart is particularly...
There have been many different models for artificial hearts but none as promising as the newest product by Abiomed. ... However the history of artificial heart research spans farther back than this. ... Beyond that, some doctors used artificial hearts as temporary solutions for pending heart transplant patients (Nunn). ... Abiomed has designed this device to service the needs of patients suffering from coronary heart disease or congestive heart failure. The Abiocor Artificial Heart shows the possibilities when different sciences come together. ...
