RADT1001 Exam Set Questions With Reviewed Correct Detailed Answers New Update!!

RADT1001 Exam Set Questions With Reviewed Correct Detailed Answers New Update!! 1. Regarding the electrocardiographic tracing, all of the following are true EXCEPT: a. repolarization of atrial muscle cells is represented by the P wave. b. the QRS-complex represents depolarization of ventricular muscle cells c. the S portion of the QRS complex represents a return to the baseline (isoelectric point). d. the U wave is theorized to represent repolarization of the papillary muscles and Purkinje fibers. - ANSWER A 2. When multiplying heart rate times stroke volume, the produce is: a. systolic pressure b. diastolic pressure c. cardiac cycle d. cardiac output - ANSWER D 3. Depending on the cause and severity of an arrhythmia, treatment may include which of the following? a. cardiac pacemakers or ICD devices b. ablation therapy c. cardioversion external shock therapy d. all of the above might be useful in treating an arrhythmia - ANSWER D 4. Systolic pressures greater than _______ mm Hg generally ensure adequate perfusion of tissues. a. 80 b. 90 c. 100 d. 120 - ANSWER B 5. Rhythmic contraction and relaxation of the chambers of the heart are controlled by principal cell types to include which of the following? 1. working cardiac cells 2. specialized neural conductive cells 3. striated muscle cells a. 1, 2 b. 1, 3 c. 2, 3 d. 1, 2, and 3 - ANSWER A 6. All of the following are true of atrial fibrillation EXCEPT: a. it is always fatal b. it is caused by additional ectopic pacemaker firings in the atria that exceed SA node firings. c. the atria syncytium quivers instead of fully contracting. d. formation of atrial emboli is a potential complication. - ANSWER A 7. To ensure a normal sequence for each cardiac cycle, each P wave should be followed by a: a. T wave b. U wave c. QRS complex d. PR wave - ANSWER C 8. When the resting membrane potential is reversed, ______ occurs and myocardial cells are stimulated to contract. a. depolarization b. repolarization c. depolarization of ventricular muscle d. repolarization of ventricular muscle - ANSWER A 9. All of the following are visible on an ECG tracing EXCEPT: a. depolarization of atrial muscle b. atrial contraction c. depolarization of ventricular muscle d. repolarization of ventricular muscle - ANSWER B 10. For analysis of an ECG tracing, which of the following below indicates regular rhythm?