Atrioventricular node

The incidence of atrial fibrillation increases with age which can causes serious problems in older people, leading to stroke and/or heart failure. Risk factors include hypertension, previous ischemic stroke, transient ischemic attack or other thromboembolic event, coronary heart disease, diabetes mellitus, heart failure, and mitral valve disease (Holding et al., 2009). In addition to advanced age, patients that are obese, of the Caucasian race, or have a history of excessive alcohol use are at…

Eighty-two years old male patient is presented to the emergency room with onset of dyspnea that is made worse by exertion, relieved by rest and oxygen. Patient stated that he did not try any of his home breathing treatments but did use home oxygen. Patient has a significant past medical history of coronary artery disease with two stents, COPD requiring home oxygen at 4lpm, hypothyroidism, and type 3 diabetes. While in the emergency department the patient was placed on a cardiac monitor and an…

The heart contains many adrenergic receptors which are responsive to epinephrine, especially near the SA node, which initiates the contractions of the heart. Epinephrine acts to increase the release time of calcium from the sarcoplasmic reticulum via a cascade of reactions. The fact that epinephrine had a positive impact on the heart indicates that the heart…

which spread across the heart causing it to contract. The main pacemaker of heart, the senatorial node, initiates the heart beat by generating an electrical impulse which travels to the left and right atria, causing them to contract. Following the start of atrial depolarization, the impulse quickly arrives at the atrioventricular node which is responsible for the contraction of ventricle. The SA node creates the electrical impulse which causes the heart to beat, but the Autonomic Nervous System…

Electrocardiogram (ECG) is used to identify any irregular heart rhythms. It does this by detecting the electrical activity of the heart as line tracings on paper, for easier analysis (Price, 2012). As Stanfield (2014) reports the cardiac muscle contracts in response to electrical depolarisation of the muscle cells. This electrical activity, when amplified and recorded, is known as an ECG. According to Maron et al, (2014) an ECG test can help detect the cause of symptoms such as chest pains or…

– left bundle branch block. An electrical current is triggers contractions of the myocardium. The body has its own built in pacemaker known as the sinoatrial (SA) node. The SA node controls the electrical current of the heart much like a pacemaker and in turn controls the rate in which the heart beats. The atrioventricular (AV) node later receives the electrical current and sends the current to the ventricles thru cells known as the AV bundle. This is the area that this victim had a blockage.…

with MRI scan A pacemaker is a medical device that is located in the chest area to regulate abnormal heart rate. This is possible with the generation of small amount of electric impulses that sends electrodes to contract the heart at its atrioventricular (AV) node. (PacemakerDiagram) Magnetic resonance imaging (MRI) scan is a medical imaging technique that creates images from different angles the body for diagnostic purposes. The principle behind an MRI scan is a strong and constant magnetic…

1. Definition of Asthma: Asthma is one of the most common type of chronic obstructive pulmonary disease (COPD). A COPD is a type of disease or disorder to which the airway is affected and causes breathing to be slowed or forced. Asthma is a type of COPD that causes the airway to become inflamed and to be hypertensive (increased pressures in the blood vessels in the airway) due to any internal or external stimuli. The system that is closely associated with asthma is the respiratory system. The…

Beneficial effects of the beta adrenergic antagonists in the treatment of the chronic obstructive pulmonary disease. It is not uncommon for the patients to present with two or more disease states at the same time. Thus, the management of such concomitant disease states may be pharmacologically challenging as it is, for example, in the treatment of the chronic obstructive pulmonary disease (COPD) and hypertension (HTN) with a compelling indication of the post-myocardial infarction (post-MI).…

During the Body Works experiments the patient performed a number of tasks. The patient performed a task called the Eat Healthy (My Pyramid/Diabetes) where she picked out a number of meals that represented the types of meals that she would eat on any given day. She selected foods like spaghetti and meatballs, a turkey sandwich, hamburger and fries, and a chocolate ice cream bar. After the patient was finished picking through the menu the machine then gave her a total for the amount of calories…