Ventricle

termed neurogenesis, has been shown to persist in many mammalian species in two regions of the adult brain: the subgranular zone of the hippocampal dentate gyrus and the subependymal zone [SEZ, also subventricular zone] adjacent to the lateral ventricles [1, 2]. Lower levels of neurogenesis have been reported in other regions of the rodent and primate brain, including the neocortex [3, 4], amygdala [5] and substantia nigra [6], but this has been difficult to replicate consistently other than in…

At approximately four weeks gestation, the ventricles begin to develop luminal projections known as trabeculations. These spongy collections of trabeculations serve to increase the surface contact of the ventricular lumen and myocytes as myocardial mass increases prior to the development of the coronary…

pacemaker the main similarity is that they both are pacemakers that send impulses to stimulate contraction of the ventricles, each have a generator with leads connecting it the ventricles. The main difference between the cardiac pacemaker and the CRT is that there are two leads to the ventricles, one to the left and one on the right, which restores the 4,6,7contraction of the left and right ventricle at the same time. This allows an even flow of blood through both chambers with better cardiac…

systolic function is measured and assessed. This will also include any formulas used to determine needed volumes and percentages. Lastly I will cover three causes of systolic dysfunction. Systolic function in its simplest terms is, how well the ventricle contracts. However,…

continuous into the venous tank, indicating the pressure in the right ventricle. The fluid then continuous to flow into the right atrium and into the pulmonary artery to a dispensable tube of length 26 centimeters giving 26 mmHg pressure. This fluid overflow is directed into the left venous tank which, its pressure indicated the pressure of the left atrium. This fluid then completes its circulation by traveling into the left ventricle to initiate a second round of circulation. This system was…

known as the circulatory cycle. There are many fun facts to know about our personal pump, but there are also many scary facts that can cause our lifelong companion to shut down, and when it shuts down, so do we! We know that the heart has atria and ventricles which are two chambers that are on each side of the heart, one is on top and one is on the bottom.…

Introduction The clinical connection that I would like to share relates to the patient I was caring for who has a history of actinic keratosis, aortic insufficiency, aortic valve replaced, basal cell carcinoma, clostridium difficile, chronic lymphoid leukemia, erosive esophagitis, GERD, heart failure, hematuria, total hip replacement, hyperlipidemia, hypertension, influenza A, osteoarthritis, iron deficiency, major depressive disorder, MERSA-nares, pressure ulcer of sacral region, squamous cell…

septum. The strongest and largest chamber in your heart is the left ventricle. They have enough force to push blood blood through the aortic valve and through your body even though it is about half an inch thick. There are many different types of valves located in the heart. The tricuspid valve manages blood flow between the right atrium and the right ventricle. The pulmonary valve regulates blood flow from the right ventricle into the pulmonary arteries, which take blood to your lungs for…

Canfield (2016) Tetralogy of Fallot is a combination of four cardiac defects. It includes a ventricular septal defect, pulmonary stenosis, right ventricular hypertrophy and an overriding aorta, where the aortic valve is enlarged and opens from both ventricles. According to “Tetralogy et al,” (2015) the pulmonary stenosis and right ventricular obstruction usually limits blood flow to the lungs. Due to this restriction, the ventricular…

spontaneous depolarization, the rate of depolarization decreases from top to bottom: fastest at the sinoatrial node; slowest within the ventricles, ectopic impulses from subsidiary pacemakers are normally suppressed by more rapid impulses from above, however, if an ectopic focus depolarizes early enough – before the arrival of the next sinus impulse – it may “capture” the ventricles, producing a premature contraction (Burns). It is also important to be aware of the electrocardiograph features of…