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CCT CCI FINAL UPDATED EXAM QUESTIONS
AND ANSWERS.
Which statement is correct regarding premature ventricular complexes (PVCs)? PVCs originate from the atrium. PVCs may be unifocal or multifocal in origin. PVCs will not lead to ventricular tachycardia. PVCs only originate from one site in the ventricles. - correct answer- PVCs may be unifocal or multifocal in origin. A regular rhythm at a rate of 40-60 beats per minute, with narrow QRS complexes, and no visible P waves, is consistent with the presence of: atrial fibrillation. sinus bradycardia. junctional rhythm. idioventricular rhythm. - correct answer- junctional rhythm. What is the proper lead placement for a right side 12 lead ECG? limb leads only placed in a mirror image of a standard 12 lead ECG
chest leads only placed in a mirror image of a standard 12 lead ECG leads V1, V2, V3 only placed in a mirror image of a standard 12 lead ECG leads V4, V5, V6 only placed in a mirror image of a standard 12 lead ECG - correct answer- chest leads only placed in a mirror image of a standard 12 lead ECG When conducting a Lexiscan stress test on a patient who is on a stretcher, what safety precaution should be taken? run a 12-lead ECG have crash cart available ensure patient has a pillow place patient in Trendelenburg - correct answer- run a 12-lead ECG Per stress test protocol, exercise capacity should be reported in _____ of exercise. exact metastatic equivalents (METs) anatomic metaphysic electrons (AMEs) estimated metabolic equivalents (METs)
Which of the following rhythms has an intrinsic rate of 40- beats per minute? SA nodal AV junctional idioventricular accelerated junctional - correct answer- AV junctional An exercise stress test performed to: evaluate disorders such as CHF. identify ischemic changes due to CAD. mimic the diastolic heart changes at rest. determine if a CABG procedure is necessary. - correct answer- identify ischemic changes due to CAD. You are beginning the warmup stage of a treadmill stress test and you observe a 3mm ST segment depression in leads I and aVL. What is the first thing you should do? continue with your pre-test activities initiate the first stage of the protocol stop the treadmill and notify the physician
make a note and continue with the protocol - correct answer- stop the treadmill and notify the physician The intrinsic rate of the Purkinje network in the ventricles is: 20 to 40 beats per minute. 40 to 60 beats per minute. 60 to 100 beats per minute. 100 to 150 beats per minute. - correct answer- 20 to 40 beats per minute. What is the heart rate of an ECG with a constant R-R interval of 30mm recorded at a standard paper speed? - correct answer- 50 bpm RR duration = R-R interval/paper speed HR=60s / RR duration 30mm / 25mm/s = 1.2s 60s / 1.2 = 50bpm Which leads are routinely checked to detect left atrial abnormality?
An anterior wall myocardial infarction occurs when anterior myocardial tissue supplied by the _____ artery suffers injury due to lack of blood supply. right circumflex obtuse marginal left anterior descending - correct answer- left anterior descending Which ECG would you expect the doctor to order when the patient has dextrocardia? posterior 12 lead ECG standard 12 lead ECG right side 12 lead ECG dextrocardia right side 12 lead ECG - correct answer- right side 12 lead ECG P-P intervals in all heart block dysrhythmias are characteristically absent. regular. irregular. unidentifiable. - correct answer- regular.
What rhythm has a normal atrial depolarization and a wide QRS complex with QR-R's pattern? ventricular fibrillation sinus rhythm with RBBB atrial tachycardia with PVCs sinus tachycardia with LBBB - correct answer- sinus tachycardia with LBBB Beta-blockers are avoided in stress testing because they decrease heart rate: increase QRS voltage. decrease PR intervals. increase ST depression. - correct answer- decrease heart rate. In standard calibration, what are the paper speed and voltage settings? 5 mm/sec, 10 mm/mV 10 mm/sec, 25 mm/mV 25 mm/sec, 10 mm/mV 50 mm/sec, 25 mm/mV - correct answer- 25 mm/sec, 10 mm/mV
Verapamil - correct answer- -calcium channel blocker -has negative chronotropic and inotropic -Treats HTN, angina and arrhyhmia After completing a standard 12 lead ECG on an adult patient, the physician requests that you include a tracing with a V4R electrode, as well. What is the physician MOST LIKELY looking for by adding this electrode? dextrocardia right bundle branch block right ventricular infarction right ventricular hypertrophy - correct answer- RV infarction Which of the following is an absolute exercise stress test termination criteria? leg pain headache moderate to severe angina moderate shortness of breath - correct answer- moderate to severe angina
Vasodilation with exercise will result in: increased afterload. decreased contractility. decreased systemic vascular resistance. increased pulmonary vascular resistance. - correct answer- decreased systemic vascular resistance. In the absence of a release form, a patient's health information may be shared with the patient's _____ without committing a HIPAA violation. child spouse physician verbally-reported power of attorney - correct answer- physician The fifth intercostal space, left midclavicular line is a landmark for what precordial electrode placement? V V V V6 - correct answer- V
excessive breast tissue never modify chest leads - correct answer- excessive breast tissue The MOST CHARACTERISTIC feature of wandering atrial pacemaker is 3 or more different QT intervals. P-R intervals. QRS durations. P wave morphologies. - correct answer- P wave morphologies. Where would you place the electrodes during a Holter hookup to reduce artifact produced by muscular movements? over the ribs low on the arms between the ribs high on the arms - correct answer- over the ribs Which two leads are referenced when interpreting axis deviation? I and aVF I and aVL II and III
V1 and V5 - correct answer- I and aVF Which of the following leads normally produces a negative P wave and a predominantly negative QRS on the ECG? V V AVR lead II - correct answer- AVR The normal QRS axis of the heart is 0 to -90 degrees. 0 to +90 degrees. +60 to -60 degrees. +60 to +120 degrees. - correct answer- 0 to +90 degrees. Lead placement for V4R is located where on the patient? 4th intercostal space, right sternal border 5th intercostal space, right mid-axillary line 5th intercostal space, right mid-clavicular line 5th intercostal space, right anterior axillary line - correct answer- 5th intercostal space, right mid-clavicular line
Which pacemaker site is the locus of stimulation for junctional rhythms? AV node SA node Purkinje fibers bundle branches - correct answer- AV node ECG PAPER provides measurement for speed and time. time and rhythm. time and voltage. rhythm and voltag - correct answer- time and voltage. Pacemaker stimuli is recorded on the ECG as a(n) upright wave. negative deflection. narrow vertical spike. straight horizontal line. - correct answer- narrow vertical spike.
When performing an exercise stress test, 85% of the predicted maximum heart rate is used to determine the time to increase speed and elevation. end point of a submaximal exercise test. point at which continuous ECG recording begins. normal heart rate response for step II in the Bruce protocol. - correct answer- end point of a submaximal exercise test. Somatic tremor is an artifact found in Holter recordings due to stress loops that are too tight. an improper ground electrode. stress loops that are not secure. electrodes being placed over muscle. - correct answer- electrodes being placed over muscle. Which leads in a 12 lead ECG are referred to as augmented limb leads? I, II, III V1, V2, V V4, V5, V aVR, aVL, aVF - correct answer- aVR, aVL, aVF What BEST describes multifocal PVCs?
a decrease in heart rate. an increase in heart rate. a decrease in force of contraction. an increase in force of contraction. - correct answer- an increase in heart rate. Atropine is used to control bradycardia. tachycardia. ventricular arrhythmias. supraventricular arrhythmias. - correct answer- bradycardia. Why might an ECG be performed? Choose two responses. diagnose changes in the heart rhythm detect blood flow through the arteries check for pressure changes in the heart determine how well the heart is pumping check for problems with the flow of electricity through the heart
- correct answer- diagnose changes in the heart rhythm check for problems with the flow of electricity through the heart Which of the following is a normal response to exercise?
increased arterial blood pressure decreased ventricular contractility decreased arterial oxygen saturation increased systemic vascular resistance - correct answer- increased arterial blood pressure The imaginary line that runs from the medial aspect of the armpit down the left side of the chest is called the: manubrium. midaxillary line. midclavicular line. anterior clavicular line. - correct answer- midaxillary line. Wolff-Parkinson-White is unique in what particular way? always fatal only arrhythmia with a delta wave induced with excessive salt consumption usually accompanied with bigeminal pvcs - correct answer- only arrhythmia with a delta wave Which of the following is an absolute contraindication for exercise stress testing? unstable angina
