Chapter 6 Atrial Dysrhythmias Exam Questions And Answers With 100% Correct Answers

Chapter 6 Atrial Dysrhythmias Exam Questions And Answers With 100% Correct Answers 1) What medical conditions place pressure on the atria, causing atrial dysrhythmias to occur? A) Renal conditions, hypertension, thrombus B) Myocardial infarction, valvular problems, neurological influences C) Cerebrovascular accident, pulmonary embolism, neurological influences D) Valvular problems, palpitations, angina - answerAnswer: B Explanation: Atrial dysrhythmias occur due to conditions that cause pressure on the atria, such as damage to the atria from myocardial infarction, valvular problems, or neurological influences. 2) What kind of impulse causes atrial dysrhythmias? A) Extrinsic B) Augmented C) Ectopic D) Inferior - answerAnswer: C Explanation: Atrial dysrhythmias are caused by an ectopic impulse in either the right or the left atrium. 3) In a premature atrial complex (PAC), the P wave may be biphasic. This means that: A) the waveform has both positive and negative deflections on the ECG tracing. B) the P wave is hidden within the T wave. C) every third complex is a premature beat. D) a changing P wave configuration with at least three variations in one lead. - answerAnswer: A Explanation: Biphasic means the waveform has both positive (upward) and negative (downward) deflections on the ECG tracing. 4) A pattern in which every third complex is a premature beat is referred to as: A) bigeminy. B) quadgeminy. C) trigeminy. D) triphasic. - answerAnswer: C Explanation: Trigeminy is a pattern in which every third complex is a premature beat. 5) Which atrial dysrhythmia has a cardiac complex that occurs too soon and may have abnormal P waves, but other than being ''early,'' has no other abnormal features? A) Atrial flutter B) Atrial fibrillation C) Wandering atrial pacemaker (WAP) D) Premature atrial complexes (PAC) - answerAnswer: D Explanation: A premature atrial complex is a cardiac complex that occurs too soon. The P wave on the early complexes may be abnormal, but the other criteria are within the normal ranges. 6) A cardiac cell or group of cells that produces an ectopic beat is known as a: A) focus. B) fusion. C) flutter. D) fascicle. - answerAnswer: A Explanation: A focus is a cardiac cell or group of cells that produces an ectopic beat. 7) How many different P wave configurations in the same lead indicate a wandering atrial pacemaker (WAP)? A) Two B) Three C) Four D) None - answerAnswer: B Explanation: At least three different P wave configurations in the same lead indicate a wandering atrial pacemaker (WAP). 8) WAP is a normal finding in children, older adults, and well-conditioned athletes. It may also be found in patients with: A) congestive heart failure and hypertension. B) cardiovascular disease and metabolic disorder. C) neurological disorders and renal insufficiency. D) organic heart disease and drug toxicity. - answerAnswer: D Explanation: WAP is a normal finding