Anatomy of the mitral valve The mitral valve or bicuspid valve is one of the four valves of the heart and is located between the left ventricle and the left atrium. The name mitral valve derives from its appearance. It resembles a bishop’s mitre and was therefore named after it. It belongs to the sail … Mitral valve
Synonyms Heart sounds, heart signs, heart rate, medical: Cor Introduction The heart ensures the blood circulation of the whole body through constant contraction and relaxation, so that all Oragne is supplied with oxygen and nutrients and decomposition products are removed. The pumping action of the heart takes place in several phases. Heart action In order … Function of the heart
Excitation formation and conduction system The work of the heart/function of the heart is triggered and controlled by electrical impulses.This means that the impulses are created somewhere and are passed on. These two functions are performed by the excitation and conduction system. The sinus node (Nodus sinuatrialis) is the origin of the electrical impulses. It … Excitation formation and conduction system | Function of the heart
Sinus node The sinus node, rarely also called Keith-Flack node, consists of specialized heart muscle cells and is responsible for the contraction of the heart by transmitting electrical potentials, and is thus the clock of the heartbeat. The sinus node is located in the right atrium just below the orifice of the right vena cava. … Sinus node | Function of the heart
Control of the heart action This whole process works automatically – but without a connection to the nervous system of the body, the heart has hardly any possibilities to adapt to the changing requirements (= changing oxygen demand) of the whole organism. This adaptation is mediated via the heart nerves from the central nervous system … Control of the heart action | Function of the heart
Heart Rate Calculation If you want to train in your individual optimal heart rate zone you should be able to calculate your optimal heart rate. The calculation is done according to the so-called Karvonen formula, where the resting heart rate is subtracted from the maximum heart rate, the result is multiplied by 0.6 (or 0.75 … Heart Rate Calculation | Function of the heart
Definition – What is the Foramen ovale? The heart consists of two atria and two chambers, which are normally separated from each other. However, the Foramen ovale represents an opening, which causes blood to pass from the right atrium to the left atrium in the fetus. Normally, blood would pass from the right atrium into … The Foramen ovale of the heart
What role does the Foramen ovale play in the baby After birth and as a result of a baby’s first breaths, there is a change in pressure within the lungs and heart. The blood no longer passes through the Foramen ovale, but passes through the natural lung and body circulation. The Foramen ovale is therefore … What role does the Foramen ovale play in the baby | The Foramen ovale of the heart
Paradoxical embolism Paradoxical embolism, also known as “crossed embolism”, is the transfer of a blood clot (embolus) from the venous to the arterial part of the bloodstream. The reason for this is a defect in the area of the heart septum, usually caused by an unclosed Foramen ovale. When the foramen ovale is closed, the … Paradoxical embolism | The Foramen ovale of the heart
Does a Foramen ovale require blood thinning? In the case of an open Foramen ovale it is not necessarily necessary to use blood-thinning medication. Thrombi can pass through the Foramen ovale, which is why the Foramen ovale indirectly increases the probability of a possible stroke in the brain or further embolisms within the large circulation. … Does a Foramen ovale require blood thinning? | The Foramen ovale of the heart
Synonym: Ventriculus sinister, left ventricle Definition The left ventricle, as part of the “great” or body’s circulation, is located downstream of the left atrium (atrium sinistrum) and pumps the oxygen-rich blood fresh from the lungs into the aorta and thus into the body’s circulation, where it supplies all the important structures with oxygen. Anatomy left … Left ventricle
Histology – Wall layering The wall layers are the same in all four heart interiors: The innermost layer is the endocardium, consisting of a single-layer epithelium, which is supported by the connective tissue lamina propria. The muscle layer (myocardium) is connected to the outside of this. The outermost layer is the epicardium. Blood supply The … Histology – Wall layering | Left ventricle
