Med Surg Ch 29 Coordinating Care for Patients with Cardiac Dysrhythmia Exam Questions With Verified Answers
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Course
Dysrhythmias
Institution
Dysrhythmias
Med Surg Ch 29 Coordinating Care for
Patients with Cardiac Dysrhythmia Exam
Questions With Verified Answers
A patient's heart rate is 48 beats per minute. Which structure is most likely generating this heart
rate?
1) Purkinje fibers
2) Sinoatrial node
3) Atrioventricular node
4) Ventricular...
EXAM STUDY MATERIALS July 23, 2024 4:26 PM Med Surg Ch 29 Coordinating Care for Patients with Cardiac Dysrhythmia Exam Questions With Verified Answers A patient's heart rate is 48 beats per minute. Which structure is most likely generating this heart rate? 1) Purkinje fibers 2) Sinoatrial node 3) Atrioventricular node 4) Ventricular pacer cells - answer✔✔ANS: 3 1) The Purkinje fibers can generate a ven tricular rate of 20 beats per minute (bpm) or less. 2) The sinoatrial (SA) node can generate impulses at a rate of 60 to 100 bpm. 3) The AV node can generate impulses at a rate of 40 to 60 bpm. 4) The ventricular pacer cells can generate impulses at a rate of 40 bpm or less. The nurse is concerned that a patient is at risk for pulseless electrical activity. What information from the assessment did the nurse use to make this clinical decision? 1) Blood pH 7.30 2) Temperature 100.5°F 3) Serum glucose level 1 70 mg/dL 4) Serum potassium level 4.1 mEq/L - answer✔✔ANS: 1 1) Causes of pulseless electrical activity include acidosis, which is reflected in a blood pH less than 7.35. EXAM STUDY MATERIALS July 23, 2024 4:26 PM 2) Causes of pulseless electrical activity include hypothermia. A temperature over 1 00°F would not be seen in hypothermia. 3) Causes of pulseless electrical activity include hypoglycemia. A blood glucose of 170 mg/dL would by hyperglycemia. 4) Causes of pulseless electrical activity include hyper - or hypokalemia. A serum potassium level of 4.1 mEq/L is within normal limits. A patient asks why cardiac leads are being placed on the chest. What should the nurse respond to this patient? 1) "It shows where the heart vessels are blocked." 2) "It is used to evaluate the effectiveness of dietary changes." 3) "It provides a graphic picture of the heart's electrical activity." 4) "It determines which medications are needed to improve heart function." - answer✔✔ANS: 3 1) An electrocardiogram does not necessarily show where the heart vessels are blocked. 2) An electrocardiogram is not used to evaluate the effectiveness of dietary changes. 3) An electrocardiogram provides a graphic representation of the heart's electrical activity. 4) An electrocardiogram is not used to determine medications to improve heart function. When analyzing a patient's electrocardiogram, the nurse notes that the P wave is normal. What criteria did the nurse use to make this decision? 1) Pointed a nd skinny in width 2) Small and rounded in lead II 3) Upright and rounded in lead II 4) Length 0.10 seconds and height 2.5 mm - answer✔✔ANS: 4 1) The QRS complex is pointed and skinny in width. 2) The U wave is small and rounded in lead II 3) The T wave i s upright and rounded in lead II. 4) The P wave itself should not be longer than 0.10 sec in length and no higher than 2.5 mm.
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