Cardiology is the branch of medicine dealing with disorders of the heart and blood vessels. The human heart is a complex organ, consisting of two ventricles and two atria. Coronary arteries feed the heart the blood it needs to sustain itself.
Vascular resistanceVascular resistance is a term used to define the resistance to flow that must be overcome to push blood through the circulatory system. The resistance offered by the peripheral circulation is known as the systemic vascular resistance SVR , while the resis
1.3 Pulmonary circulationThe pulmonary circulation is a circuit of blood circulation in the cardiovascular system, serving exclusively the lungs, where red blood cells pick up oxygen and release carbon dioxide during respiration. Deoxygenated blood is pumped out of the right vent (Oxygenation of the blood)
Pulmonary arteryThe pulmonary arteries carry blood from the heart to the lungs. They are the only arteries (other than umbilical arteries in the fetus) that carry deoxygenated blood. In the human heart, the pulmonary trunk begins at the base of the right ventricle. It is
Pulmonary veinThe pulmonary veins carry blood from the lungs to the left atrium of the heart. They are the only veins in the adult human body that carry oxygenated blood.
1.4 Cardiac pacemakerThe contractions of the heart are controlled by electrical impulses, these fire at a rate which controls the beat of the heart. The cells that create these rhythmical impulses are called pacemaker cells, and they directly control the heart rate. Artificia (Electrical system of the heart)
Electrical conduction system of the heartThe normal electrical conduction in the heart allows the impulse that is generated by the SA node of the heart to be propagated to (and stimulate) the myocardium (muscle of the heart). When the myocardium is stimulated, it contracts. It is the ordered sti
