Atrial Dysrhythmias Chapter 6 Exam with Questions and Answers

Atrial Dysrhythmias Chapter 6 Exam with Questions and 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 ANSWER Answer: 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 ANSWER Answer: 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.