*NURSING > QUESTIONS & ANSWERS > EKG Final Exam 2022 questions with answers (100% correct) (All)

EKG Final Exam 2022 questions with answers (100% correct)

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A branch of the _______ supplies the right atrium and right ventricle with blood Correct Answer: right coronary artery (RCA) Stimulation of parasympathetic nerve fibers typically results in what act... ion? Correct Answer: Slowed conduction through the atrioventricular (AV) node The contribution of blood that is added to the ventricles and results from atrial contraction is called: Correct Answer: atrial kick Semilunar Valves include: Correct Answer: pulmonary valve and aortic valve The left main coronary artery divides into the Correct Answer: LAD and Cx branches _____ cells are specialized cells of the electrical conduction system responsible for the spontaneous generation and conduction of electrical impulses. Correct Answer: Pacemaker The absolute refractory period beings with.... Correct Answer: begins with the onset of the QRS complex and terminates at approximately the apex of the T wave T/F: The QT interval represents the time from initial depolarization of the ventricles to the end of ventricular repolarization Correct Answer: true How do you determine whether the atrial rhythm on an ECG tracing is regular or irregular? Correct Answer: compare P-P intervals Which ECG leads use two distinct electrodes, one of which is positive and the other negative? Correct Answer: leads I, II, and III In sinus arrhythmia, a gradual decreasing of the heart rate is usually associated with? Correct Answer: expiration An ECG rhythm strip shows a ventricular rate of 46 bpm, a regular rhythm, a PR interval of 0.14 second, a QRS duration of 0.06 second, and one upright P wave before each QRS. This rhythm is: Correct Answer: sinus bradycardia SA block is a disorder of ______, and sinus arrest is a disorder of impulse _______. Correct Answer: SA block is a disorder of conduction Sinus arrest is a disorder of formation Signs and symptoms experienced during a tachydysrhythmia are usually primarily related to: Correct Answer: decreased ventricular filling time and stroke volume Example that reflects ectopic (latent) pacemaker: Correct Answer: the AV junction and ventricles [Show More]

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