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Week 10 CON
Week 10 Basic ECG Interpretation
| Question | Answer |
|---|---|
| Match the property of the cardiac conduction system with its description. Property of the cell that allows it to accept initiation of stimulation | Excitability |
| Property that moves electrical impulse along a membrane. | Conductivity |
| Ability of heart muscle to respond mechanically to an impulse. | Contractility |
| Ability of heart muscle to initiate an impulse, begin stimulation. | Automaticity |
| List in order the pathway of the normal cardiac impulse starting at the SA node. | - The impulse causes the atria to contract. - The impulse travels from the AV node through the bundle of His. - The impulse divides into the left and right bundle branches. - The impulse reaches the Purkinje fibers. - The ventricles contract. |
| An increase in the rate of cardiac impulse initiation is linked to stimulation of which component? | Sympathetic nervous system |
| Which electrolytes play key roles in polarization of the heart cells? | Sodium and potassium |
| Which wave on the ECG tracing will provide the nurse more information about atrial depolarization? | B - The P wave demonstrates the initial firing of the SA node. The P wave can display as positive (upright), negative (inverted), or biphasic (both positive and negative). |
| A patient asks the nurse, “Why do I need a 12-lead ECG if my heart rate is within normal limits?” The nurse responds by explaining that which heart conditions may be identified by the 12-lead ECG? | - Cardiotoxicity - Irregular rhythm - Myocardial infarction |
| Which ECG component would the nurse measure to identify the total time needed for ventricular depolarization and repolarization of a patient’s heart? | D - The QT interval is the time it takes for ventricular depolarization and then repolarization. It is calculated by measuring the distance between the QRS complex and the T wave. |
| The nurse is assessing heart rate from a patient’s ECG and counts 8 R-R intervals in a 6-second stretch. The patient’s heart rate is beats per minute. | 80 = 8 x 10 |
| A review of a patient’s 12-lead ECG reveals sinus bradycardia. Which information should the nurse expect to find in the patient history? | Marathon training - Increased intracranial pressure - Prolonged exposure to extreme cold |
| A nurse is gathering the history for a patient with sinus tachycardia. Which information should be expected based on the patient’s condition? | Anemia |
| A patient presents with fatigue, dizziness and chest pain. On assessment, the patient’s heart rate is 55 beats per minute and blood pressure is 85/60. A dopamine.The nurse should expect the health care provider to schedule the patient for which procedure? | Placement of a permanent pacemaker |
| A patient presents with a sinus rate of 150 beats per minute and body temperature of 103 °F; the patient is otherwise clinically stable. How should the nurse prepare to manage the patient’s sinus tachycardia? | Prepare to administer antipyretics. |
| Which statement describes the role of the Purkinje fibers in the pathway of the normal cardiac cycle? | Conduction of impulses through the ventricles leading to ventricular muscle contraction |
| Which action results in the atria after firing of the sinoatrial (SA) node? | Contraction of the atria to move blood to the ventricles. |
| Which physiologic process is responsible for repolarization of heart cells? | Movement of sodium out of the cell |
| The nurse is reviewing a patient’s ECG reading and notices artifact on the monitor. Which action should the nurse perform to identify the cause of the artifact? | Determine the condition of the conductive gel on the electrodes |
| A nursing student is discussing a rhythm strip with the faculty member. Which rationale explains a shortened QT interval? | A faster heart rate |
| Using the R-R interval formula, the heart rate in the strip shown measures beats per minute. | 10 x 9 = 90 |
| The nurse obtains an ECG for a 53-year-old patient with chest pain. The nurse palpates a heart rate of 106. Which alteration in waveform should the nurse expect to see on the ECG tracing? | Short QT interval |
| The nurse is caring for a patient with chest tightness and shortness of breath. The ECG tracing reports sinus tachycardia. Which additional finding should be expected? | Heart rate is 114 beats per minute |
| ?The nurse is teaching a cardiac seminar for a local community center. The nurse knows further teaching is needed if a member makes which comment about bradycardia? | “I should stop my speed walking sessions since my heart rate is 50 beats per minute.” |
| Match the sinus rhythms with the relevant patient signs. Patient reports no clinical signs or symptoms; HR is 80 bpm. Patient reports exhaustion and episodes of fainting; HR is 50 bpm. Patient reports being in extreme emotional stress; HR is 102 bpm | - Sinus rhythm - Sinus bradycardia - Sinus tachycardia |
| A patient calls the health care provider’s office reporting dizziness and fatigue. The patient started taking a beta blocker one week ago. The patient’s radial pulse is 52 bpm. Which instruction should the nurse give the patient? | “Consult your health care provider about stopping the beta blocker.” |
| A patient reports dizziness and dyspnea. On assessment, the patient’s heart rate is 130 bpm. An ECG indicates normal P-wave, PR interval, and QRS complex. The patient reports that the symptoms What is the priority intervention for this patient? | Administer pain medications as prescribed. |
| A patient presents with sinus tachycardia with a heart rate of 122. The patient also has pneumonia. Which assessment question should the nurse ask the patient first to identify the cause of the patient’s symptoms? | "Have you taken any over-the-counter medications since you became sick?” |
| A patient presents during a normal well-visit with a heart rate of 58 beats per minute. The patient is an avid runner and is currently training for a triathlon. All other Which statement indicates to the nurse the patient teaching is understood? | “I do not need to take any medications. My heart rate is expected because of my triathlon training.” |
Created by:
Brandi Sizemore
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