ICU Monitoring and ECG Applications
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Questions and Answers

Which of the following conditions would NOT typically warrant continuous electrocardiographic monitoring?

  • Post-cardiac surgical procedures
  • Traumatic cardiac contusion
  • Stable angina (correct)
  • Acute myocardial infarction
  • Placing ECG limb leads over bony prominences is primarily intended to:

  • Improve detection of subtle ST segment changes
  • Increase the accuracy of heart rate measurement
  • Minimize the risk of electrode detachment
  • Reduce interference from muscle contractions (correct)
  • The 'modified lead II' configuration is most commonly used in:

  • Stress testing
  • Routine ICU monitoring (correct)
  • Electrophysiology studies
  • Holter monitoring
  • Compared to the monitor setting, the diagnostic setting for ECG monitoring typically has a:

    <p>Higher bandwidth, suitable for detailed waveform analysis (A)</p> Signup and view all the answers

    Continuous ECG monitoring is beneficial in patients undergoing fluid resuscitation because it assists in:

    <p>Tracking changes in heart rate and rhythm (D)</p> Signup and view all the answers

    When would selecting the diagnostic ECG mode be most advantageous?

    <p>To evaluate for potential myocardial ischemia (C)</p> Signup and view all the answers

    Electrocardiographic monitoring in the ICU is primarily used to:

    <p>Diagnose and manage cardiac arrhythmias (C)</p> Signup and view all the answers

    What results from the overinflation of the balloon during pulmonary artery catheterization?

    <p>Pressure tracing that continues to rise to high levels (C)</p> Signup and view all the answers

    What is the primary purpose of the pulmonary artery catheterization?

    <p>To sample mixed venous oxygen saturation (C)</p> Signup and view all the answers

    Which zone of the lungs is best for obtaining an uninterrupted column of blood during pulmonary artery catheterization?

    <p>Zone III (B)</p> Signup and view all the answers

    What occurs when the mean airway pressure is greater than the pulmonary venous pressure in zones I and II?

    <p>Collapse of the pulmonary vasculature (D)</p> Signup and view all the answers

    What should be done to ensure appropriate advancement of the catheter after obtaining a pulmonary capillary wedge tracing?

    <p>Deflate the balloon and withdraw 1 mL (A)</p> Signup and view all the answers

    What is the primary reason for monitoring ST segments in patients with coronary artery disease?

    <p>To detect myocardial ischemia (A)</p> Signup and view all the answers

    Where should lead placement be for optimal detection of inferior wall ischemia?

    <p>In the V5 position along the anterior axillary line (C)</p> Signup and view all the answers

    What preparation is necessary before electrode placement for electrocardiographic monitoring?

    <p>The skin should be clean and dry (A)</p> Signup and view all the answers

    What is the typical electrical potential available for skin surface monitoring in myocardial ischemia patients?

    <p>0.5 to 2.0 mV (B)</p> Signup and view all the answers

    Which type of leads is considered superior for detecting arrhythmias compared to lead II?

    <p>Esophageal leads (B)</p> Signup and view all the answers

    What is a common complication related to the use of electrocardiographic monitoring?

    <p>Technical error or equipment malfunction (C)</p> Signup and view all the answers

    Which electrode material is commonly used for electrocardiographic monitoring?

    <p>Silver–silver chloride gel (B)</p> Signup and view all the answers

    How can difficulty with low electrical signals in monitoring be resolved?

    <p>Reapplying the electrode after cleaning the skin (A)</p> Signup and view all the answers

    What can significantly reduce the electrical resistance of the stratum granulosum in electrocardiography?

    <p>Cleansing the skin (D)</p> Signup and view all the answers

    What effect does decreasing damping have on the oscillating frequency?

    <p>It increases the oscillating frequency. (D)</p> Signup and view all the answers

    Which of the following factors increases damping in the system?

    <p>Using more compliant connecting tubing. (D)</p> Signup and view all the answers

    What happens to systolic and diastolic pressure readings in cases of excessive damping?

    <p>Systolic pressure is underestimated and diastolic pressure is overestimated. (B)</p> Signup and view all the answers

    How is the damping coefficient of a system determined?

    <p>By applying and releasing a square pressure wave. (D)</p> Signup and view all the answers

    What effect does air in the transducer dome or tubing have on the system?

    <p>It increases system damping. (C)</p> Signup and view all the answers

    Which statement best describes continuous-wave Doppler devices?

    <p>They continuously transmit and receive sound waves. (B)</p> Signup and view all the answers

    What is the primary consequence of an underdamped system?

    <p>Overestimation of systolic pressure. (B)</p> Signup and view all the answers

    What determines the resonant frequency of a system in relation to damping?

    <p>Both natural frequency and damping coefficient. (D)</p> Signup and view all the answers

    What condition is necessary for a Doppler shift to occur?

    <p>Blood must move relative to the transducer. (D)</p> Signup and view all the answers

    What role does the angle correction play in Doppler measurements?

    <p>It adjusts for velocity measurement accuracy. (A)</p> Signup and view all the answers

    What is the optimal damping coefficient for ensuring minimal effect on amplitude?

    <p>0.7 (B)</p> Signup and view all the answers

    What is the consequence of overdamping in a measuring system?

    <p>Decreased frequency response (C)</p> Signup and view all the answers

    Which artery is most commonly preferred for invasive blood pressure monitoring?

    <p>Radial artery (B)</p> Signup and view all the answers

    What might cause an overestimation of systolic pressure in blood pressure monitoring?

    <p>Distal occlusion of the radial artery (B)</p> Signup and view all the answers

    What complication is most commonly associated with arterial catheters?

    <p>Infection (A)</p> Signup and view all the answers

    Why might women have a lower incidence of arterial thrombosis compared to men?

    <p>Different hormonal levels (C)</p> Signup and view all the answers

    What is the typical incidence of arterial occlusion when cannulating patients with 20-gauge Teflon catheters?

    <p>10% (C)</p> Signup and view all the answers

    What is the primary artery supplying blood to the hand, in terms of dominance in the population?

    <p>Ulnar artery (A)</p> Signup and view all the answers

    What effect can distal occlusion of the radial artery have on pressure readings?

    <p>Overestimation of systolic pressure (B)</p> Signup and view all the answers

    What typically occurs when overdamping affects a measuring system?

    <p>Loss of detail in pressure readings (D)</p> Signup and view all the answers

    Study Notes

    Intensive Care Monitoring

    • Physiologic monitoring is used in ICU for high-risk patients
    • Monitoring is selected and applied to detect pathophysiological abnormalities
    • Monitoring helps to adjust therapy to appropriate physiological endpoints

    Electrocardiography

    • Continuous ECG monitoring tracks heart rate and detects arrhythmias
    • Evaluates pacemaker function and helps identify myocardial ischemia or electrolyte abnormalities
    • Monitoring is important for patients at risk of arrhythmias, acute myocardial infarction, and electrolyte imbalances
    • ECG monitoring helps in diagnosing and treating potential issues

    Clinical Applications

    • Lead placement: Modified Lead II configuration is best for routine monitoring; placement over shoulders minimizes noise.
    • Lead V1 positioning is useful for anterior and lateral wall ischemia; Modified V5 (CS5) positioning is beneficial for patient positioning issues.
    • Complications: Loose electrodes, poor connections, and electrical equipment malfunction can cause issues
    • 60 Hz interference may cause issues, and reapplying electrodes may solve signal reception problems

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    Related Documents

    Intensive Care Monitoring PDF

    Description

    This quiz covers the principles of physiologic monitoring in Intensive Care Units, focusing on its importance for high-risk patients. It includes the role of continuous ECG monitoring in detecting cardiac issues and its clinical applications such as lead placement and common complications.

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