contracts in and then relaxes as a beat occurs‚ and it can be seen through the EKG. It first begins in the SA node where it starts the impulse‚ then it is delayed at the Av node‚ then the impulses passes the heart apex and ventricular excitation begins‚ which leads to the ventricular excitation to be complete. As the impulses move around the heart it allows us to track the blood flow of the heart and the changes that occur in voltage or other areas within the
Premium Heart rate Action potential Heart
Origin of the ECG signal Shi Zhu Department of Computer and Electrical Engineering University of Ottawa Ottawa‚ Canada Szhu060@uottawa.ca Abstract—the technical report paper mainly introduces the concepts of heart and ECG signal and how the blood flow through the heart from the entrance of the heart to the entire body. Also‚ this paper describes some procedures of electrical activation of the heart and the genesis of the electrocardiogram like polarization and depolarization waves. That the point
Premium Cardiac electrophysiology Cardiac muscle Heart
1. These cells generate a rhythmical depolarisation‚ which then spreads out over the atria to the atrio-ventricular node. 2. The atria then contract‚ pushing blood into the ventricles. 3. The electrical conduction passes via the Atrio-ventricular node to the bundle of His‚ which divides into right and left branches and then spreads out from the base of the ventricles across the myocardium. 4. This leads to a ’bottom-up’
Premium Heart Blood Circulatory system
Potassium is one of the body’s major ions. Nearly 98% of the body’s potassium is intracellular. The ratio of intracellular to extracellular potassium is important in determining the cellular membrane potential. Small changes in the extracellular potassium level can have profound effects on the function of the cardiovascular and neuromuscular systems. The kidney determines potassium homeostasis‚ and excess potassium is excreted in the urine. The reference range for serum potassium level is 3
Premium Potassium
Exam #1 Spring 2002 Anatomy and Physiology 2150 Dr. Jones Choose the correct answer for each question and mark it on your bubble sheet. Be careful to follow the instructions on the bubble sheet for correctly recording your answers. 1. Which of the following statements is true? A. Blood is an organ B. Blood is a connective tissue X C. Blood is composed of living cells only D. None of the above 2. Which of the following would be considered a normal
Free Blood Red blood cell Heart
Sleep Making Us Obese?" Nutrition Bulletin 33.4 (2008): 272-278 Menifield‚ Charles E.‚ Nicole Doty‚ and Audwin Fletcher. "Obesity in America." ABNF Journal 19.3 (2008): 83-88 Sudhakar Sattur‚ et al. "Obesity in Adolescence Is Associated With Left Ventricular Hypertrophy and Hypertension." Echocardiography 28.2 (2011): 150-153
Premium Obesity
Discussion and Practical Application of Interpersonal Relations in Nursing Theory Hildegard Peplau’s Interpersonal Relations in Nursing‚ published in 1952‚ emerged before the thrust of nursing theory development. Educationally‚ nursing students were discouraged from theoretical learning. Nursing was not considered a profession in 1952. Rather‚ nurses were viewed as physician helpers‚ being called upon based on the physician’s assessment of the patient’s condition and the assistance deemed appropriate
Premium Nursing Nursing theory
Cardiovascular Anatomy & Physiology I. Structures and Functions Heart Muscle * Has 3 layers (epicardium‚ myocardium‚ and endocardium) and a surrounding sac called the pericardium * Location: In the mediastinum‚ above the diaphragm‚ and is surrounded on both sides by lung * Shape: Resembling triangle‚ with base parallel to the right edge of the sternum Heart Chambers * The right side of the heart is a low pressure system and the left side is a high pressure system
Premium Heart Blood
CARDIAC CATHETERIZATION CPT PROCEDURE Joanne Johnson AHLT 255 – Advanced Coding Abstract Cardiac catheterization or Heart catheterization is a common diagnostic procedure for many heart-related problems. It examines blood flow to the heart and test how well the heart is pumping. It is the only test that is 100% accurate for diagnosis of possible blockages is a heart cath. Having a catheterization done can prevent heart attacks that cause muscle damage to the heart. Before the procedure you
Premium Heart Cardiology Atherosclerosis
of data in which each record is stored in a certain format‚ allowing for sorting and organization of such data to generate information and knowledge. Therefore‚ in order to capture information and identify patients at risk for developing atrial fibrillation (AFib) after open heart surgery a database plan will need to be developed. The aim of developing this database plan is for early detection and implementing preventive measures to decrease the prevalence of AFib following open heart surgery. This
Premium Myocardial infarction Entity-relationship model