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Exam (elaborations)

Basic dysrhythmias Exam Questions With Verified Answers

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EXAM STUDY MATERIALS July 23, 2024 4:26 PM Basic dysrhythmias Exam Questions With Verified Answers What do you do if artifacts occur on an ECG? - answercheck connections in equipment rhythm starts in the SA node, 60-100 BPM, normal conduction pathway - answernormal sinus rhythm normal P wave ...

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  • August 1, 2024
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  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • Dysrhythmias
  • Dysrhythmias
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EXAM STUDY MATERIALS July 23, 2024 4:26 PM Basic dysrhythmias Exam Questions With Verified Answers What do you do if artifacts occur on an ECG? - answer✔✔check connections in equipment rhythm starts in the SA node, 60 -100 BPM, normal conduction pathway - answer✔✔normal sinus rhythm normal P wave leng th - answer✔✔.06-.20 the time of passive of impulse through the atria, causing atrial depolarization (atrial contraction) - answer✔✔P wave normal PR interval length - answer✔✔.12-.20 time taken for the impulse the spread through the atria, AV node, and bun dle of HIS, bundle branches, & purkinje fibers, right up until ventricular contraction. (atrial contraction -> beginning of ventricular contraction) - answer✔✔PR interval normal QRS length - answer✔✔<.12 time taken for depolarization of both ventricles (systole - ventricular contraction) - answer✔✔QRS normal ST segment length - answer✔✔.12 time between ventricular depolarization and repolarization; should be isoelectric. (end of systole -> beginning of diastole) - answer✔✔ST segment normal T wave length - answer✔✔.16 ventricular relaxation (diastole) - answer✔✔T wave is K or Na higher inside the cell? - answer✔✔K is K or Na higher outside the cell? - answer✔✔Na what happens with depolarization of a cell? - answer✔✔Na influx into cell normal QT - answer✔✔.34-.43 EXAM STUDY MATERIALS July 23, 2024 4:26 PM time taken for entire depolarization/repolarization of ventricles (ventricular contraction + relaxation) (ventricular diastole + systole) - answer✔✔QT the ability of a cardiac cell to fire spontaneously without being activated - answer✔✔automaticity the ability of a cell to become depolarized; determined by the length of time after depolarization that they can be restimulated (the refractory periods) - answer✔✔excitability SA node is firing <60 BPM P, QRS, T all normal regular rhythm - answer✔✔sinus b radycardia is sinus bradycardia ever normal? - answer✔✔yes- it's only significant when symptomatic symptoms of sinus bradycardia - answer✔✔syncope, chest pain, pale/cool skin, hypotension, weakness, angina, dizziness, confusion, SOB SA node firing >100 BPM regular rhythm normal P and QRS QT <0.35 (shortened) - answer✔✔sinus tachycardia the nurse knows that exercise, fever, pain, hypotension, hypovolemia, anemia, hypoxia, hypoglycemia, myocardial ischemia, HF, hyperthyroid, and anxiety can all cause - answer✔✔sinus tachycardia why may sinus tachycardia cause angina? - answer✔✔inc O2 consumption in the heart sinus tachy Tx - answer✔✔vagal stimulation, beta blocker, adenosine, CCB sinus brady Tx - answer✔✔atropine (anticholinergic) (if that doesn't work - dopami ne, epi) atrial tachydysrhymia recurring, regular, COARSE, SAWTOOTH -SHAPED waves caused by one single point in the R atrium regular rhythm PR interval unmeasurable QRS normal

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