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Cardiac Monitoring & Emergency Response Flashcards

7 cards from real CCT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Cardiac Monitoring & Emergency Response flashcards as text
  1. When applying electrodes for a 5-lead bedside monitoring system, where is the chest (C/V) electrode typically placed for the MCL1 equivalent?

    Answer: Right sternal border, 4th intercostal space

    The chest electrode placed at V1 position (right sternal border, 4th ICS) with lead III selected approximates the MCL1 monitoring lead.

  2. ST-segment changes are measured from which reference point on the ECG?

    Answer: The J point (end of QRS)

    ST-segment elevation or depression is measured at the J point (junction between the end of the QRS complex and the beginning of the ST segment).

  3. A patient with a known history of long QT syndrome is placed on telemetry. Which rhythm is this patient most at risk of developing?

    Answer: Torsades de pointes

    Long QT syndrome predisposes patients to early afterdepolarizations that can trigger torsades de pointes, a polymorphic ventricular tachycardia.

  4. Which of the following best describes the correct action after identifying ventricular fibrillation on the monitor?

    Answer: Begin CPR and prepare for unsynchronized defibrillation

    VF is a pulseless rhythm requiring immediate CPR and unsynchronized defibrillation; no R wave exists to synchronize a shock.

  5. A QRS complex that measures 0.14 seconds is best described as:

    Answer: Prolonged, indicating bundle branch block

    A QRS duration ≥0.12 seconds (120 ms) indicates intraventricular conduction delay such as bundle branch block; 0.14 s is clearly prolonged.

  6. During a code, a patient in pulseless electrical activity (PEA) is being resuscitated. Which reversible cause should be considered related to cardiac tamponade?

    Answer: Pericardial effusion compressing the heart

    Cardiac tamponade (pericardial fluid accumulation) is one of the 'H's and T's' reversible causes of PEA and requires emergency pericardiocentesis.

  7. Wenckebach (Mobitz type I) second-degree AV block is characterized by:

    Answer: Progressive PR prolongation until a QRS is dropped, then reset

    Mobitz type I block shows progressive PR interval lengthening with each cycle until one P wave fails to conduct, after which the PR interval resets to its shortest value.