Dysrythmias

Good Essays
Lewis: Medical-Surgical Nursing, 9th Edition
Chapter 36
Nursing Management: Dysrhythmias
KEY POINTS

RHYTHM IDENTIFICATION AND TREATMENT
• The ability to recognize normal and abnormal cardiac rhythms, called dysrhythmias, is an essential nursing skill.
• Four properties of cardiac cells (automaticity, excitability, conductivity, and contractility) enable the conduction system to start an electrical impulse, send it through the cardiac tissue, and stimulate the myocardial tissue to contract.
• The autonomic nervous system plays an important role in the rate of impulse formation, the speed of conduction, and the strength of cardiac contraction. Electrocardiogram Monitoring
• The electrocardiogram (ECG) is a graphic tracing of the electrical impulses produced in the heart.
• ECG waveforms are produced by the movement of charged ions across the semipermeable membranes of myocardial cells.
• There are 12 recording leads in the standard ECG. Changes in a 12-lead ECG may occur with ischemia, infarction, electrolyte imbalance, conduction disturbances, dysrhythmias, or drug toxicity.
• Continuous ECG monitoring is done using one or more leads and based on the patient’s clinical status.
• Telemetry monitoring involves the observation of a patient’s heart rate (HR) and rhythm to help rapidly diagnose dysrhythmias, ischemia, or infarction.
• Normal sinus rhythm starts in the sinoatrial (SA) node and follows the normal conduction pattern of the cardiac cycle. o The P wave represents the depolarization of the atria (passage of an electrical impulse through the atria), causing atrial contraction. o The PR interval represents the time period for the impulse to spread through the atria, atrioventricular (AV) node, bundle of His, and Purkinje fibers. o The QRS complex represents depolarization of the ventricles (ventricular contraction). o The QRS interval represents the time it takes for depolarization. o The ST segment represents the time between ventricular

You May Also Find These Documents Helpful

  • Powerful Essays

    14. CHOLINERGIC AGONISTS AND CHOLINESTERASE INHIBITORS CHOLINERGIC AGONISTS Overview “muscarinic receptor agonists” cholinergic agonists are drugs that act on acetylcholine receptors, thus causing excitation of the parasympathetic autonomic nervous system there are 2 types of acetylcholine receptors 1) NICOTINIC RECEPTORS - are receptor-mediated ion channels - 3 types RECEPTOR TYPE MUSCLE TYPE GANGLION TYPE LOCATION - neuromuscular junction - sympathetic autonomic ganglia - parasympathetic autonomic…

    • 4271 Words
    • 18 Pages
    Powerful Essays
  • Good Essays

    crash cart

    • 3344 Words
    • 14 Pages

    circulatory problems. One of the things you will find is a defibrulator. What this machine is is a device that when programmed to will send a very high jolt of electricity to the bottom of the paddles to patients experiencing life threatening heard dysrythmias. Having those paddles in the right ccorelation with the heart the jolt from the paddles will be so strong that it will in a way reset the heart beat by stopping it and letting it start again only this time in the correct and safe…

    • 3344 Words
    • 14 Pages
    Good Essays
  • Good Essays

    Cerebrovascular Accident

    • 979 Words
    • 4 Pages

    more vessels and are the most common type of ischemic stroke. It is also called Lacunar Strokes because of the cavity that is created once the infracted brain tissue disintegrates. • Cardiogenic Embolic Strokes are associated with cardiac dysrythmias, usually atrial fibrillation. Emboli originate from the heart and circulate to the cerebral vasculature, most commonly the left middle cerebral artery, resulting in stroke. Embolic stroke may be prevented by the use of anticoagulation therapy in…

    • 979 Words
    • 4 Pages
    Good Essays
  • Powerful Essays

    Genitourinary: Case Study

    • 4395 Words
    • 18 Pages

    Genitourinary- 40 questions Assessment Findings *PAIN won’t always be present. KIDNEY: (dull constant ache) Not always present if pt has renal disease (don’t have w/ proteinuria or hematuria) Have CVA tenderness (hit hand over kidney), lower abdominal pain, intermittent pain(indicates renal stones), flank pain (side) N/V, diaphoresis, s/sx of shock. Cause: Acute obstruction like stone, clot BLADDER- lower ABD pain (usually seen w/ distention) dull, continuous pain may be intense after voiding…

    • 4395 Words
    • 18 Pages
    Powerful Essays
  • Good Essays

    Diuretics: Open-Book Quiz

    • 3652 Words
    • 15 Pages

    Chapter 39 Diuretics Open-Book Quiz, Chapter 39 1. Three uses of diuretics include treatment of hypertension, mobilization of edematous fluid, and used to prevent renal failure. 2. Aldosterone is the principal mineralocorticoid of the adrenal cortex; it stimulates reabsorption of sodium from the distal cortex. 3. Most diuretics share the same basic mechanism of action: they block sodium and chloride reabsorption. The greatest diuresis is produced by those drugs whose site of action…

    • 3652 Words
    • 15 Pages
    Good Essays
  • Powerful Essays

    Nurse Study Guide

    • 3620 Words
    • 15 Pages

    Chest Tubes -continuous bubbling= air leak -bubbling with inspiration= okay -continuous bubbling in suction chamber= okay -up and down in water seal= okay Types of Insulin -Rapid Acting (lispro, humalog) -Onset= 5 minutes -Peak= 30 minutes -Short Acting (novolog, regular) -Onset= 30 minutes -Peak= 2 hours -Intermediate Acting (NPH) -Onset= 1 hour -Peak= 6-12 hours -Long Acting (Humulin) -Onset= 4 hours -Peak= 16-18 hours -Maslows= PhysiologicSafetyLove & BelongingEsteem…

    • 3620 Words
    • 15 Pages
    Powerful Essays
  • Powerful Essays

    NUR 317 - Cardiac Exam Study Guide Define the following terms. Describe patient symptoms and conditions that could cause alterations in: Cardiac Output Volume of blood flowing through systemic or pulmonary circuit expressed in liters per min Normal= 5 L/min (resting adult) HRXSV= CO Factors: preload, afterload, myocardial contractility, heart rate As heart rate increases, this allows less time for diastole and the heart often cannot fill adequately. Therefore, a very rapid heart will often have…

    • 4125 Words
    • 17 Pages
    Powerful Essays
  • Powerful Essays

    Cardiovascular Disease

    • 4202 Words
    • 17 Pages

    Chapter 14: Critical Care Nursing (Pg 338-366, 412-437) Chapter 15: Cardiovascular Disorders Coronary Artery Disease Description and Etiology The biggest contributor to cardiovascular system- related morbidity and mortality is coronary artery disease. Atherosclerosis is a progressive disease that affects arteries throughout the body. (CAD) Risk Factors for CAD 1. Age, Gender, Race (non-modifiable) a. More common in men than women b. Higher in women over 75 years of age 2. Family History…

    • 4202 Words
    • 17 Pages
    Powerful Essays
  • Better Essays

    Geriatric Assessment

    • 7896 Words
    • 32 Pages

    Comprehensive Geriatric Assessment The geriatric assessment is a multidimensional, multidisciplinary diagnostic instrument designed to collect data on the medical, psychosocial and functional capabilities and limitations of elderly patients. Various geriatric practitioners use the information generated to develop treatment and long-term follow-up plans, arrange for primary care and rehabilitative services, organize and facilitate the intricate process of case management, determine long-term care…

    • 7896 Words
    • 32 Pages
    Better Essays
  • Powerful Essays

    Study Guide

    • 17954 Words
    • 72 Pages

    SAN COLLEGE CENTRAL ASSOCIATE DEGREE NURSING RNSG 1341 COMMON CONCEPTS OF ADULT HEALTH Original Spring 2001 Revised May 2012 Revised Spring 2013 MISSION The San Jacinto College Central Campus Department of Associated Degree Nursing (ADN) will provide an educational environment of the highest standards, to prepare graduates committed…

    • 17954 Words
    • 72 Pages
    Powerful Essays