A nurse is caring for a client in a cardiac unit. Using the five criteria for ECG analysis information, the nurse interprets the client's ECG as which of the following rhythm interpretations?Heart Rate: 59 bpmRhythm: RegularPresence of P waves: One P wave for every QRS complexPR interval: 0.20 secondsQRS complex duration: 0.10 seconds
Ventricular tachycardia
Sinus tachycardia
Sinus bradycardia
Normal sinus rhythm
The Correct Answer is C
A) Ventricular tachycardia: Ventricular tachycardia is characterized by a rapid heart rate exceeding 100 bpm, typically arising from abnormal ventricular activity. In this case, the heart rate is 59 bpm, which does not support this interpretation. Additionally, ventricular tachycardia usually presents with wide QRS complexes and no discernible P waves, neither of which is true in this scenario.
B) Sinus tachycardia: Sinus tachycardia is defined by a heart rate exceeding 100 bpm originating from the sinoatrial (SA) node, with a regular rhythm and normal P waves. The heart rate of 59 bpm in this client is too low for a diagnosis of sinus tachycardia, making this option incorrect.
C) Sinus bradycardia: Sinus bradycardia occurs when the heart rate is less than 60 bpm, with a regular rhythm and a normal PR interval and QRS duration. The provided data shows a heart rate of 59 bpm, a regular rhythm, one P wave for every QRS complex, a PR interval of 0.20 seconds, and a QRS duration of 0.10 seconds, which aligns perfectly with the criteria for sinus bradycardia.
D) Normal sinus rhythm: Normal sinus rhythm typically presents with a heart rate of 60-100 bpm, a regular rhythm, and appropriate P waves for each QRS complex. Given the heart rate of 59 bpm, this does not meet the criteria for normal sinus rhythm, as it falls below the acceptable range.
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Correct Answer is C
Explanation
A) Apply cold therapy to the affected leg: Cold therapy may be used for certain conditions to reduce swelling and pain, but in the case of suspected deep vein thrombosis (DVT) indicated by redness, warmth, tenderness, and pain in the calf, cold therapy is not appropriate. Instead, the focus should be on confirming the diagnosis before applying any treatment.
B) Monitor Homan's sign: Homan's sign involves dorsiflexion of the foot to assess for pain in the calf, which can suggest DVT. However, it is no longer considered a reliable diagnostic tool. Instead, confirmation through imaging or other diagnostic measures is preferred, so simply monitoring this sign would not be sufficient in this situation.
C) Obtain a venous duplex ultrasound: A venous duplex ultrasound is the gold standard for
diagnosing DVT. Given the client’s symptoms—redness, warmth, tenderness, and pain in the calf—the appropriate order is to obtain this ultrasound to confirm the presence of a thrombus. This imaging study provides critical information for diagnosis and subsequent management.
D) Obtain impedance plethysmography: While impedance plethysmography can assess venous flow and help diagnose DVT, it is less commonly used than venous duplex ultrasound. The more direct and widely accepted method for diagnosing DVT in this scenario is the ultrasound, making this option less suitable as the initial order.
Correct Answer is B
Explanation
A. Within the expected reference range: While a blood pressure of 130/82 mm Hg is close to normal, it is not considered fully within the expected reference range. The normal range is typically defined as less than 120/80 mm Hg.
B. Elevated: The reading of 130/82 mm Hg falls into the "elevated" category, which is defined as systolic blood pressure between 120-129 mm Hg and diastolic pressure less than 80 mm Hg. This indicates that while the client is not hypertensive, they are at increased risk for developing hypertension in the future.
C. Stage 2 hypertension: This category is defined by a systolic reading of 140 mm Hg or higher, or a diastolic reading of 90 mm Hg or higher. The client’s reading does not meet these criteria, so this option is not applicable.
D. Stage 1 hypertension: Stage 1 hypertension is characterized by systolic readings between 130-139 mm Hg and diastolic readings between 80-89 mm Hg. Although the systolic reading is in the Stage 1 range, the diastolic reading of 82 mm Hg places the overall reading in the "elevated" category, rather than Stage 1 hypertension.