CRAT PRACTICE EXAM 4 with 100% correct answers

CRAT PRACTICE EXAM 4______ _________ helps to correct cardiac rhythm conditions? - correct answer Radiofrequency ablation helps to correct cardiac rhythm conditions. The ablations help by scarring or even destroying the tissue in the heart that is triggering the abnormal heart rhythm. The axes of the three bipolar limb leads form a triangle around the heart known as which of the following? - correct answer Einthoven's triangle is the standard positions for limb leads I, II, and III. The electrodes for these leads are placed equidistant from the heart and form an equilateral triangle. The ECG appearance for ventricular tachycardia would include all of the following except? - correct answer Normal blood pressure The ECG appearance of ventricular tachycardia would include: No P waves No pulse No CO No QRS Only fluttering of the heart There are two modes of pacemaker function, which one of these initiate impulses at a set rate regardless of the patient's intrinsic heart rate? - correct answer Asynchronous The asynchronous or fixed rate mode pacemakers initiate impulses at a set rate, regardless of the patient's intrinsic heart rate. The fixed rate mode of pacing is known as asynchronous due to the fact that it is not synchronized to sense the patient's own heart rhythm. Which of the following is caused by an irritable focus in the AV junction that speeds up to take over as the heart's pacemaker? - correct answer Accelerated junctional rhythm is caused by an irritable focus in the AV junction that speeds up to take over as the heart's pacemaker. The atria are depolarized by means of retrograde conduction, and the ventricles are depolarized normally. The accelerated junctional rate is generally between 60-100 bpm.