Electrocardiography

Electrocardiography (ECG or EKG from Greek: kardia, meaning heart) is the recording of the electrical activity of the heart. Traditionally this is in the form of a transthoracic (across the thorax or chest) interpretation of the electrical activity of the heart over a period of time, as detected by electrodes attached to the surface of the skin and recorded or displayed by a device external to the body.[3] The recording produced by this noninvasive procedure is termed an electrocardiogram (also ECG or EKG). It is possible to record ECGs invasively using an implantable loop recorder.

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The aorta

The aorta

The beginning of the ascending aorta, the aorta, emerging out of the left ventricle, isolated by the aortic valve. Both arteries branched from the base of the heart of the coronaria aorta, aortic valve on top. The aorta is then curved back surround arteries pulmonalis. Three blood vessels appear out of the arcus aortae, i.e. arteries carotis communis artery, brachiocephalica sinistra, and arteries subclavia sinistra. These vessels vessels supplying blood to the head and the arm. The aorta is then down the body. The top of the diaphragm (in the chest) aortic thoracalis pars and called the bottom of the diaphragm (the abdomen) is called aortic abdominal pars. When moving down the posterior wall of the abdomen, abdominal aorta circulates on the left inferior cava vein, branches into the main blood channels on the stomach and intestines, as well as the kidneys. There are many forms of branches that can be found in the digestive system of vaskulatur. The most common form is the branch of the aortic truncus celiacus, forming the superior mesenterica, and also the arteries mesenterica inferior. The left usually branched arteries of abdominal aorta in between celiacus and truncus artery mesenterica superior. Aorta ends with a fork 2, namely the iliaca iliaca artery and sinistra communis communis dextra to supply blood to the lower limbs and the pelvis. The traits The aorta is the elastic arteries, thus it can expand. When the left ventricle contracts to force blood flow into the aorta, the aorta expands. This strain gives the potential energy that will help maintain blood pressure during diastole, since that time, the aorta contracts passively.

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diastol

Arteries are muscular blood vessel that carries blood from the heart. This function contrary vein function which carries blood toward the heart. The circulatory system is extremely important in sustaining life. Its main function is to deliver oxygen and nutrients to all cells, as well as transporting waste substances such as carbon dioxide. In developing countries, two main death incident caused by infarction of myocardium and artery stroke on the system, such as atherosclerosis. The system has a pressure vessels high on the circulatory system. Blood pressure usually indicates the pressure in the main artery. Pressure at a time when the heart expands and blood enters the heart is called diastol. Sistol pressure means blood pressure when the heart is contracting and blood out of the heart. This can be in the blood pressure measurement with tensimeter or sfigmomanometer. Types of vessels There are several types of vessels on the body: Artery pulmonaris These vessels carry blood that have recently streamed deoxygenation of the lungs. Systemic arteries Systemic arteries carrying blood to the arterioles, and then to the capillaries, where nutrients and gases are exchanged. The Aorta The aorta is the largest artery in the body out of the ventricles of the heart and brings a lot of oxygen. The Arterioles The arterioles is the smallest vessels associated with capillary vessels. Capillaries These vessels are not real vessels. This is where the exchange of substances that become the main function of the circulatory system. Capillaries are the vessels that connect the branches of the artery and the vein branches the least with the cells of the body. Artery and vein that branches, branches and the size of the vessels that the farther from the heart is getting smaller. Capillaries are very smooth and thin-walled.

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