Practice Test Nclex Style EKG Correctly Answered.

Practice Test Nclex Style EKG Correctly Answered. A nurse is assessing an electrocardiogram rhythm strip. The P waves and QRS complexes are regular. The PR interval is 0.16 second, and QRS complexes measure 0.06 second. The overall heart rate is 64 beats per minute. The nurse assesses the cardiac rhythm as: A. Normal Sinus Rhythm B. Sinus Bradycardia C. Sick Sinus Syndrome D. First-degree heart block - CORRECT ANSWER A. Normal Sinus Rhythm measurements are normal, measuring 0.12 to 0.20 second and 0.4 to 0.10 second, respectively. A nurse notices frequent artifact on the ECG monitor for a client whose leads are connected by cable to a console at the bedside. The nurse examines the client to determine the cause. Which of the following items is unlikely to be responsible for the artifact? A.Frequent movement of the client B. Tightly secured cable connections C. Leads applied over hairy areas D. Leads applied to the limbs - CORRECT ANSWER B. Tightly Secured Cable Connections Motion artifact, or "noise," can be caused by frequent client movement, electrode placement on limbs, and insufficient adhesion to the skin, such as placing electrodes over hairy areas of the skin. Electrode placement over bony prominences also should be avoided. Signal interference can also occur with electrode removal and cable disconnection. A nurse is watching the cardiac monitor and notices that the rhythm suddenly changes. There are no P waves, the QRS complexes are wide, and the ventricular rate is regular but over 100. The nurse determines that the client is experiencing: A. Premature ventricular contractions B. Ventricular tachycardia C. Ventricular fibrillation D. Sinus tachycardia - CORRECT ANSWER B. Ventricular Tachycardia Ventricular tachycardia is characterized by the absence of P waves, wide QRS complexes (usually greater than 0.14 second), and a rate between 100 and 250 impulses per minute. The rhythm is usually regular.