Dysrhythmia Quiz 1 to 37 With Correct Answers Graded 100%

Dysrhythmia Quiz A conduction problem above the level of the bundle branches will largely affect the P wave and PR interval. T or F - Answer-T The period of time during the cardiac cycle when cells cannot respond to a stimulus, no matter how strong, is called the relative refractory period. - Answer-F If the wave of depolarization (electrical impulse) moves toward the positive electrode, the waveform recorded on ECG graph paper will be upright (positive deflection). - Answer-T If the wave of depolarization (electrical impulse) moves toward the positive electrode, the waveform recorded on ECG graph paper will be inverted (negative deflection). - Answer-F When electrical activity is not detected on the ECG, a straight line is recorded called the "baseline" or "isoelectric line." - Answer-T In atrial fibrillation, the AV node attempts to protect the ventricles from the hundreds of impulses bombarding it per minute by blocking many of the impulses generated by the irritable sites in the atria. - Answer-T Upon conversion of atrial fibrillation to sinus rhythm, the patient should be observed for signs of a possible stroke. - Answer-T In atrial fibrillation, fibrillatory waves are referred to as "f waves." - Answer-T The ventricular rhythm in atrial fibrillation is usually "irregularly irregular." - Answer-T The intrinsic rate of the atrioventricular (AV) junction is a. 20 to 40 beats/min. b. 40 to 60 beats/min. c. 60 to 80 beats/min. d. 80 to 100 beats/min. - Answer-b.40 to 60 beats/min. The ECG does not provide information about: a. Conduction disturbances. b. The presence of ischemic damage. c. Electrical effects of medications and electrolytes. d. The mechanical (contractile) condition of the myocardium - Answer-d.The mechanical (contractile) condition of the myocardium 12. What does the QRS complex represent? a. Atrial depolarization b. Ventricular contraction c. Ventricular repolarization d. Ventricular depolarization - Answer-d.Ventricular depolarization 13.The normal pacemaker of the heart is the, which is found in the . a. SA node; left atrium b. AV node; right atrium c. SA node; right atrium d. AV node; left atrium - Answer-c. SA node; right atrium