Which of the following terms is used when an adult has a pulse rate of 110 to 140 beats per minute?
Dysrhythmia
Tachycardia
Bradycardia
Pyrexia
The Correct Answer is B
A. Dysrhythmia. Dysrhythmia refers to an irregular heart rhythm, not necessarily a fast heart rate. Tachycardia can be regular or irregular.
B. Tachycardia. Tachycardia is defined as a heart rate above 100 beats per minute in adults. A pulse rate of 110 to 140 bpm falls within this range.
C. Bradycardia. Bradycardia refers to a slow heart rate (below 60 bpm), which is the opposite of tachycardia.
D. Pyrexia. Pyrexia refers to fever (elevated body temperature), not an increased heart rate.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Falsely low. Using an adult-sized cuff on a child results in an overestimation of the cuff size, causing the cuff to not inflate properly and distribute less pressure, leading to a falsely low blood pressure reading.
B. Indistinct. The reading may be inaccurate, but it will still produce a numerical value rather than being completely indistinct.
C. Accurate. Accuracy depends on using a cuff size appropriate for the child's arm circumference. An adult cuff on a child is too large, leading to an incorrect reading.
D. Falsely high. A too-small cuff would produce a falsely high reading, but an oversized cuff produces a falsely low blood pressure.
Correct Answer is B
Explanation
A. Positioning the bell very lightly over the patient's sternum. The bell is best for low-pitched sounds like murmurs, but heartbeats (especially S1 and S2) are better heard with the diaphragm over the apex of the heart, not the sternum.
B. Placing the diaphragm firmly against the patient's skin. The diaphragm is designed to pick up high-pitched sounds like the normal S1 and S2 heart sounds. Pressing firmly helps eliminate external noise and improves sound clarity.
C. Utilizing a stethoscope with the longest possible tubing. Longer tubing can reduce sound transmission quality. Shorter tubing (about 14-18 inches) provides clearer sound.
D. Making sure that the earpieces fit loosely in the nurse's ear canals. Earpieces should fit snugly, not loosely, to ensure optimal sound conduction and block external noise.
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