Cardiac pacemaker

Questions Test 2 Professor Vernet 1. The beginning of the cardiac cycle starts with deoxygenated blood from the systemic circulation entering the heart into the right atrium from the superior and inferior vena cava. A chamber of the heart beats because of the electrical impulses located around areas of the heart that travel across the heart which allows the muscles to contract.The SA node located in the right atrium is also known as the pacemaker of the heart, this node conducts an electrical…

QRS rhythm. Most episodes are short and terminate spontaneously. They occur with equal frequency in anterior and inferior infarctions (Ashok et al. 2011). This arrhythmia results from either (1) Failure or structural damage of the SA or AV nodal pacemaker or enhanced vagal tone leading to depres-sion of nodal automaticity and function and an escape…

He also had a history of complete heart block requiring implantation of a permanent pacemaker 4 years prior. He was admitted to the Cardiology service with a presumptive diagnosis of viral upper respiratory tract infection and to rule out infective endocarditis. Physical examination on admission revealed no focal cardiac, respiratory or abdominal findings. The patient was found to have clear lungs, with normal heart sounds and no murmur. Neurological…

Ron was seen today following the HRCT scan to assess for the significance of the crackles in the setting of his mild decrease in gas transfer factor. The HRCT showed multiple bilateral calcified pleural plaques consistent with his known past asbestos exposure, probably as a child, and some mild subpleural reticulation in the bi-basal regions noted, but no interstitial fibrotic change. The significance of these findings is uncertain and given that we have no past chest imaging that Ron can…

stem cells restored rhythmic function of cardiac tissue.79 Further transplantation of these cells into cardiac muscle in the body also showed that these cells caused the heart to beat. Developing cardiac cells that can control the heart beat of the heart is important because they could be used to help the pacemaker of the heart function correctly. This way, patients with irregular beating hearts or other cardiac issues will not need a mechanical pacemaker to help the heart beat correctly. This…

blood throughout the body. Where they are placed in irregular intervals within the muscle. The Cardiac muscle is also known as the myocardium. The movement of the muscle is automatic and constant rhythmic movements that won’t stop. It contractions of the heart consist of the heart taking blood out of the heart and then relaxes to fill the heart back up with blood (Martini & Nath,2014 p.689-692). Each cardiac muscle fiber is made up of a single nucleus that has the appearance of striated or…

Within Kathy A. Fackelmann’s article titled, “Cardiac electricians: radio waves can cure a racing heart” Fackelmann writes about the ability to fix abnormalities in heartbeats and heart rates by using perfected radio waves. Thus, the problem at hand is the ailments of patients suffering from Paroxysmal supraventricular tachycardia (PSVT) who need relief from their symptoms. The ideology of solvency came in the form of modified radio-wave therapy so that a target frequency would practicly restart…

Que: 1 Describes the components and conduction pathway of the cardiac conduction system of the heart.relate the cardiac condution system to the corresponding sequence of heart chamber contractions. The cardiac conduction system refers to a group of specialized muscle cells of the heart’s wall (Assadi, 2013). The cells are meant to send signals to the cardiac muscles thus contraction. The major components of the cardiac conduction system are the Atrioventricular node, sinuatrial node, the bundle…

dizziness, fainting spells, fatigue, chest pain, and shortness of breath. Third degree heart block can cause sudden cardiac arrest in patients which can cause death. The patient will need the placement of a permanent pacemaker implant. "When a patient is born with third degree heart block they may not present with any symptoms at birth or early childhood but will eventually need a pacemaker implanted" (Nihgov,…

timing of switching can influence the development of the cells; whether they become cardiac progenitor cells or specialized cardiomyocytes which can be utilized in regenerative medicine. (cite) Cardiac cell differentiation Through experimentation Xiaowu Sheng and his colleagues were able to utilize induced pluripotent stem cells and undifferentiated embryonic stem cells in order to observe variability among cardiac cells. Using induced pluripotent cells from human foreskin fibroblasts and a…