Medtronic Cardiac Rhythm Management (CRM) Practice Test

These questions are part of the practice quiz. Start practicing

• What does the Q wave signify in the heart's electrical activity?
• What is one potential cause for fluctuating pacing thresholds?
• How do heart valves function in the cardiovascular system?
• What is the average weight of a male heart?
• What is the primary characteristic of the Micra catheter pacing system?
• What is referred to as the resting phase in the cardiac cycle?
• What is the role of the left phrenic nerve?
• What is an immediate response of a pacemaker upon the removal of a magnet?
• Which characteristic defines the battery pack in a cardiac device?
• Which factor can affect sensing in pacing systems?
• How do cartilaginous bones contribute to the spine?
• What does final rapid repolarization signify in the cardiac cycle?
• What does voltage refer to in a cardiac device context?
• What effect does applying a magnet to an ICD have?
• The fourth letter of the NBG code indicates which aspect of cardiac pacing?
• What does the P wave represent in an electrocardiogram?
• When should a pacemaker be replaced?
• What occurs during Phase 3 of the cardiac cycle?
• What are the insulated wires in cardiac devices known as?
• When is a single chamber pacing system typically utilized?
• What is the NBG code used for in cardiac pacing?
• What does the first letter of the NBG code indicate?
• What does capture threshold refer to in cardiac pacing?
• What does the endocardium layer do?
• In which situation would abnormal pacing impedances be indicated?
• What percentage fluctuation from baseline measurements is considered abnormal for pacing impedances?
• What is the primary function of the sternum?
• What types of signals are typically classified as unwanted sensed signals in cardiac devices?
• Which question is most relevant for assessing a patient's pacing needs?
• What is the function of sensing assurance in pacing systems?
• Why is pulse width significant in cardiac pacing?
• What is the function of the mitral valve in the heart?
• Which factor affects battery longevity?
• What is the role of the SA node in the heart?
• Which of the following is NOT a type of threshold test?
• What does 'end of service' mean in the context of pacemakers?
• What effect do electrolytes have on pacing?
• Which term describes the threshold when a pacemaker battery needs to be replaced?
• What is the normal rate of the Purkinje network?
• What is the function of the pericardium?
• Where is the Purkinje network located?
• What is the primary purpose of conducting observations during threshold tests?
• Which phase of the cardiac cycle is associated with repolarization?
• What is the primary purpose of an anode in cardiac leads?
• What is the normal rate of the AV Node?
• Which component aids in separating the thoracic cavity from the abdominal cavity?
• What feature distinguishes myocardium from other heart layers?
• What could likely cause a pacemaker to reach its end of service?
• What does the second letter of the NBG code represent?
• How can incorrect sensing of skeletal muscle myopotentials affect device operation?
• What does it mean if a device's response to sensing is 'triggered'?
• What do the ribs protect?
• What should be done if a magnet is applied but telemetry data is necessary?
• What restriction exists regarding initiating magnet mode in a cardiac device?
• What type of leads are referred to as "multipolar" leads?
• In which situation would a patient commonly receive a triple chamber system?
• What does a safety margin refer to in threshold testing?
• When might a voltage multiplier be necessary in pacemaker operation?
• During a threshold test, what action should be taken if the pacing is not effective?
• How does an increased amplitude affect cardiac pacing?
• What characteristic describes the epicardium layer of the heart?
• How is automaticity significant to cardiac function?
• Why might magnets be used with cardiac devices besides arrhythmia detection?
• What is the function of the Bundle of His?
• What mechanism does active fixation in lead positioning involve?
• What is the key feature of the Model 3830 lead?
• How is an ectopic beat characterized in relation to normal heartbeats?
• What is the primary function of the diaphragm in the human body?
• In the context of threshold testing, what does the term "symptomatic" refer to?
• What is the size of an infant's heart?
• What initiates the electrical impulses that regulate the heart's rhythm?
• What could be a potential impact of malfunction in the heart's automaticity?
• What type of feedback is critical for determining the success of lead placement?
• Which type of test involves amplitude decrement?
• What condition may arise if the electrode-tissue interface becomes obstructed?
• What does the strength-duration curve illustrate?
• What type of membrane surrounds the heart?
• What factor primarily determines the longevity of a cardiac device?
• What material are cardiac leads primarily made of?
• What does the QRS complex indicate in an electrocardiogram?
• What describes passive fixation in lead positioning?
• What does impedance refer to in the context of cardiac devices?
• Which of the following is NOT a common pacing mode?
• What method can be used to minimize the inflammatory process when electing leads?
• What does the term "impedance" refer to in a cardiac context?
• What characteristic is associated with transvenous leads?
• What is a common method used for evaluating lead integrity after placement?
• What programming mode is optimal for managing a dislodged atrial lead?
• What does sensing refer to in the context of pacemakers?
• What are considered optimal impedance values for cardiac devices?
• In what situation can magnets be utilized on ICDs?
• How is the pacemaker signal created?
• What is one of the primary purposes of DDD pacing mode?
• Which structure is involved in facilitating the contraction of the heart?
• Which part of the heart is responsible for coordinating the contraction of the ventricles?
• How often are lead impedances measured in pacing devices?
• What action should be performed if P wave amplitude falls below the acceptable range?
• What does the acronym ICD stand for in cardiac management?
• What is the "R on T" phenomenon?
• Which characteristic of electrodes is crucial for effective myocardial capture?
• In the context of cardiac leads, what does the term "leak" indicate?
• What is a sign that indicates capturing the heart outside of the natural refractory period?
• What does depolarization in cardiac physiology refer to?
• Which pacing system is characterized by a fully self-contained unit?
• What is the impact of intrinsic activity being sensed in a pacing mechanism?
• What is the significance of the clavicle?
• What does the term "effective refractory period" imply about the cardiac muscle cells?
• During the effective refractory period, what is true about depolarization?
• What is the role of an implantable pulse generator in a cardiac device?
• What does VVI mode provide in a pacing system?
• What physiological changes can occur during lead maturation?
• What is the primary characteristic of the tricuspid valve?
• Which type of lead configuration is primarily used to target the left ventricle?
• Which phase of the cardiac action potential is associated with a failure of the cell to generate another impulse?
• How is the concept of safety margin most commonly calculated?
• What is the purpose of adjusting the pulse width in a pacemaker?
• What is an acceptable chronic R wave amplitude value?
• What characterizes the plateau phase of repolarization in cardiac physiology?
• What measurement technique is typically used for monitoring R wave amplitudes?
• What is the default pacing rate of RRT in Medtronic devices?
• What characterizes Phase 2 of the cardiac action potential?
• How many letters are typically in the NBG code?
• Which two properties work together to create a normal sinus rhythm?
• Which condition might indicate high resistance in a lead?
• What does the third letter of the NBG code signify?
• What period is defined as phases 0 to 3 in the cardiac cycle?
• What is the primary function of cathodes in lead configurations?
• What is the primary function of the leads in a cardiac rhythm management system?
• Which electrode in a cardiac device is characterized as the positive electrode?
• Which of the following is a part of the thoracic cavity?
• If an atrial lead has dislodged into the ventricle and is sensing the QRS, what action should be taken?
• Which valve is located between the right atrium and the right ventricle?
• What factors should be considered for percent pacing?
• What is the role of the aortic valve in the cardiovascular system?
• What is the defining characteristic of a strong impulse during the relative refractory period?
• What is a potential indicator of low resistance in cardiac leads?
• What is one of the primary concerns when dealing with lead electrical issues?
• What should be ensured before starting a threshold test?
• Which of the following is NOT one of the three layers of the heart wall?
• What does the AV node do in cardiac function?
• What anatomical structure does the right phrenic nerve pass over before it reaches the diaphragm?
• What action occurs when intrinsic activity is sensed according to cardiac device protocol?
• What phenomenon occurs at the electrode-tissue interface that involves a buildup of charge?
• What does the term "threshold" imply in a clinical context?
• What is repolarization in terms of heart function?
• What does the cathode represent in a cardiac device system?
• What is the average weight of a female heart?
• What is the composition of vertebrae?
• Which observation can indicate an ineffective pacing threshold?
• What does a triple chamber pacing system involve?
• Where can percent pacing information be found?
• What is the normal resting heart rate range for adults?
• What can be inferred if a patient is noted to be asymptomatic during threshold testing?
• What is usually monitored in a ventricular threshold test?
• What type of bones are ribs categorized as?
• What happens when the magnet is removed from a cardiac device?
• What must the amplitude of a pacemaker be to ensure successful myocardial capture?
• To perform an atrial sensing test, what is the first step?
• What is primarily represented by the QRS complex on an ECG?
• In a pacing device, what does the term 'inhibited' refer to?
• What is the main indication for using leads placed in the coronary sinus vein?
• In the context of cardiac leads, what does the term 'amplitude' refer to?
• What indicates that the battery status is "ok" in the measurement report?
• Which layer of the heart is primarily composed of involuntary muscle?
• What does capture management automatically monitor?
• What is an acceptable chronic P wave amplitude value?
• What can lead to changes in the capture threshold during pacing?
• What is the primary consequence of the refractory period in cardiac action potential?
• What is the desired outcome for P and R waves in a pacemaker?
• What physiological change occurs during the P wave on an electrocardiogram?
• In which pacing mode would "R" indicate a rate-responsive function?
• What is a key feature of an AAI pacemaker?
• Which phase is characterized by the heart being unresponsive to any stimuli?
• What issue might be detected if lead crush is identified on a chest x-ray?
• What occurs during the T wave of an ECG?
• In a bipolar lead configuration, where does the impulse return to?
• What is the normal rate of the SA Node?
• What explains the action potential of a cardiac cell?
• What happens to cardiac cells during depolarization?
• What is one of the first steps in performing a ventricular threshold test?
• Which factors influence the capture threshold in cardiac pacing?
• Which statement best describes epicardial leads?
• Which phase indicates the end of depolarization?
• What pacing mode is indicated when intrinsic conduction is lost?
• During which phase does early, rapid depolarization occur?
• What event occurs during Phase 0 of the cardiac action potential?
• What is an important factor to consider when evaluating threshold test results?
• What is the definition of safety margin in regard to cardiac pacing?
• Which term describes the relaxation phase of the cardiac cycle?
• What is considered normal pacing impedances?
• Where is the pulmonary valve located?
• What does systole refer to in cardiac physiology?
• In medical terms, what are the ribs known to be?
• What should be conducted if automatic threshold results are abnormal?
• In a dual chamber pacemaker, where is the atrial lead typically placed?
• What parameters are necessary for effective myocardial capture?
• Which structure connects the ribs to the vertebrae?
• What can happen when a device senses far-field events?
• What does automaticity in cardiac physiology mean?
• What does the thoracic cavity primarily include?
• Where are pacing leads typically placed in the subclavian method?
• What can using a magnet on ICDs effectively do during surgical procedures?
• Which value signifies that the pacing threshold is within an acceptable range?
• What is the primary purpose of increasing the sensitivity in cardiac devices?
• What describes the impulse flow in a unipolar lead configuration?
• How frequently are P and R wave amplitudes measured in a clinical setting?
• Which best describes a single chamber system in cardiac pacing?
• What describes the relative refractory period?
• What mechanism is critical for securing transvenous leads during implantation?