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ECG
Chapter 5
| Question | Answer |
|---|---|
| What is evaluated and classified when determining dysrhythmias? | Waves, segments, and intervals on the ECG tracing |
| QRS duration measurement is essential to determine the time it takes for: | Ventricular contraction |
| Analyzing the shape of the P waves to see if they are all the same shape is to determine whether: | Atrial contraction occurred |
| Name one of the questions necessary to analyze a P wave of the ECG tracing. | Does each P wave have a QRS complex following it? |
| The normal PR interval measurement is: | 0.12 to 0.20 second |
| The normal QRS complex duration measurement is: | 0.06 to 0.10 second |
| The QRS duration measurement represents the time it takes for: | The ventricles to depolarize or contract |
| Measuring the PR interval requires the ECG technician to measure the period of time represented by the: | Beginning of the P wave to the beginning of the QRS complex |
| If you can't identify an R wave on the ECG tracing, which of the following wave(s) would you use to determine the regularity of the ventricles? | Q and S wave junction |
| What is the rate of a normal sinus rhythm? | 60 to 100 bpm |
| Identify a rhythm using these criteria: Regular rhythm, ventricular and atrial rates are 60-100 beats/minute, P wave precedes each QRS, PR interval and QRS duration within normal limits. | Normal sinus rhythm |
| Which sinus rhythm has a rate of less than 60 beats per minute? | Sinus bradycardia |
| What are common symptoms of low cardiac output? | A. Dizziness, confusion B. Chest pain, palpitations C. Shortness of breath, hypotension D. All of these <--- |
| The ECG tracing is considered a legal document and needs to be included in the patient's medical record. What three items must be on each ECG tracing? | Patient's name, today's date, initials of the ECG technician |
| A patient with sinus bradycardia may require what type of treatment? | Medication or a pacemaker |
| Which sinus rhythm has a rate of more than 100 beats per minute? | Sinus tachycardia |
| What is the normal or "primary" pacemaker of the heart? | SA node |
| Sinus tachycardia may be a normal finding in persons as a result of: | Low cardiac output |
| Sinus tachycardia is considered serious or life-threatening in patients who have had a recent: | Myocardial infarction |
| What symptom do patients with sinus tachycardia often complain of? | Palpitations |
| What rhythm shows an irregularity during inspiration and expiration? | Sinus dysrhythmia |
| The condition in which impulses over the vagus nerve cause a decrease in heart rate is known as: | Vagal tone |
| In which dysrhythmia do the P-P and R-R intervals progressively widen, then narrow, following the patient's breathing pattern? | Sinus dysrhythmia |
| In sinus dysrhythmia, if the heart rate decreases to 40 to 50 beats per minute, the patient may complain of: | palpitations, dizziness |
| Which dysrhythmia occurs when the SA node stops firing, causing a pause in electrical activity? | Sinus arrest |
| What must occur if sinus arrest exceeds 6 seconds? | Code Blue procedures must be initiated |
| Lack of blood supply to an area of tissue due to a blockage in the circulation to that area is known as: | Ischemia |
| A condition in which the patient loses consciousness or faints is known as: | Syncope |
| No rhythm or electrical current traveling through the cardiac conduction system is known as: | Asystole |
| On the ECG tracing, what precedes and follows the sinus arrest period? | Changing P wave |
| The ECG complexes are determined to occur in a regular pattern. What method do you use to best calculate the heart rate? | R-R method |
| Sinus bradycardia (SB) has almost the same criteria as sinus rhythm; the only difference is that the: | Heart rate is slower |
| In determining the type of ECG rhythm the patient has, the ECG technician is required to evaluate the components of the ECG rhythm strip, including all the following EXCEPT: | Measurement of the U wave |
| After you measure the QRS duration and configuration, what other questions need to be answered? | A. Are all the QRS complexes of equal length? B. What is the actual measurement, and is it within normal limits? C. Do all the QRS complexes look alike? D. All of the above <--- |
| If a QRS complex measures 0.12 second or wider, it most likely indicates: | Delayed ventricular conduction |
| Signs and symptoms of adequate cardiac output include: | A. Alert and oriented patient B. No difficulty breathing, stable blood pressure C. No chest pain or pressure D. All of the above <--- |
| What do you do if the patient you are monitoring is very pale and breathing very fast, yet his monitor indicates he is in sinus rhythm? | A. Report his condition to a licensed practitioner immediately B. Take another ECG tracing to see if the rhythm changes C. Call a Code Blue medical emergency D. All of the above <--- |
| What rhythm originating from the sinus node is affected by the patient's breathing pattern? | Sinus rhythm |
| What two rhythms originating in the sinus node only affect the heart rate? | Sinus rhythm, sinus arrest |
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KIMMYCO