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met can contain viruses. Unless you need to edit, at's safer to stay in Protected View. Enable Editing CHAPTER 34 CARE OF THE PATIENTS WITH DYSRHYTHMIAS Define the followings Excitability Depolarization Conductivity AV junctional area Automaticity Contractility Purkinje fibers Precordial leads QRS duration Sinoatrial node Lead axis P wave QT interval Bundle of His Limb leads Cardiac axis PR interval ST segment SVT QRS complex Premature complexes Bigeminy R wave Br PSVT hmias tachydysrhythmias PAC Atrial fibrillation Describe the three methods for determining heart rate What is the 8-step method for ECG rhythm analysis What is the Vaughn-William Classification of drugs: What would you see for a patient with sinus tachycardia? What would you teach the patient? you see for a patient with sinus bradycardlia? What are the interventions? What would you see when caring for a patient with Afib? How is it managed What is the CHAD scoring system? What would you see when managing a patient with PVC's? How is it managed What is ventricular tachycardia? What is ventricular fibrillation? How are they managed What is ventricular asystole and how is it managed? What's the difference between CPR and ACLS? What is an automated external defibrillation? How do you prevent or decrease dysrhythmias? What are your considerations for the older patient with dysrhythmias What is taught to patients with permanent pacemakers/ DOLLExplanation / Answer
AUTOMATICITY : Automaticity is the smooth muscle unit that have the ability to initiate their own contraction independently of nerve stimulation.
EXCITABILITY : Excitability refers to the cardiac muscle cell membrane which can transmit an action potential.
CONDUCTIVITY : The heart possesses the property of autorhythmicity, which means it generates its own electrical impulses and beats independently of nervous or hormonal control, however it is supplied with both sympathetic and parasympathetic autonomic nerve fibres.
DEPOLARIZATION : The instability caused by the sinoatrial node leads them to discharge (depolarise) regularly, usually between 60 and 80 times a minute. Their depolarisation is followed by recovery (repolarisation), but almost immediately their instability leads them to discharge again, setting the heart rate, depolarization occurs in all the four chambers in the heart.
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