Cardiac Dysrhythmias.docx - Cardiac Dysrhythmias Terms o...

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Cardiac Dysrhythmias Terms o Bigeminy= a cardiac rhythm in which each normal beat is followed by an abnormal one. o Cardioversion= a medical procedure by which an abnormally fast heart rate (tachycardia) or cardiac arrhythmia is converted to a normal rhythm using electricity or drugs. . o Defibrillation= treatment for life-threatening cardiac dysrhythmias and vfib. Defibrillation consists of delivering a therapeutic dose of electrical energy to the heart with a device called a defibrillator o Dysrhythmia= abnormality in a physiological rhythm, especially in the activity of the brain or heart. o Fibrillation= An irregular, often rapid heart rate that commonly causes poor blood flow. o Purkinje network= a complex fibrous network of large muscle cells that spread through the right and the left ventricles of the heart and carry the impulses that contract those chambers almost simultaneously. o QRS complex= a name for the combination of three of the graphical deflections seen on a EKG. It is usually the central and most visually obvious part of the tracing. It corresponds to the depolarization of the right and left ventricles of the human heart. o Repolarization= refers to the change in membrane potential that returns it to a negative value just after the depolarization phase of an action potential has changed 3 the membrane potential to a positive value Nursing Responsibility o EKG recognition continues to be a nursing responsibility in any acute care setting. o It is possible to gain basic understanding of EKG interpretation in a short time to relate basic cardiac physiology to electrical events on a monitor. o Rhythm recognition can help you intervene efficiently and effectively in a potentially difficult clinical situation Dysrhythmias o Definition : disorder of the formation or conduction of the electrical impulse within the heart, altering the rate, rhythm, or both and potentially causing an altered blood flow. o Causes: include electrolyte imbalance, drug therapy or toxicity, injury, ischemia, trauma. o Evaluation EKG telemetry monitoring Electrophysiology studies Holter monitoring Stress testing Dysrhythmia Classification o Dysrhythmias are classified by Rate (atrial or ventricular) Conduction pathway Pacemaker location Identifying Dysrhythmias o Dysrhythmias are named according to the site of origin of the impulse and the mechanism of formation or conduction involved. o Sites of Origin Sinus (SA) node, AtriA, Atrioventricular (AV) node or junction, Ventricles o Mechanism of Formation or Conduction
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Normal rhythm, bradycardia, tachycardia, flutter, fibrillation, premature complexes, conduction Blocks Normal Sinus Rhythm o NSR occurs when the electrical impulse starts at a regular rate and rhythm in the sinus node and travels through the normal conduction pathway.
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  • Spring '14
  • Brinkley
  • Atrial fibrillation, Cardiac electrophysiology, ventricular tachycardia, Ventricular fibrillation

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