CET NHA Certified EKG Technician - Set 2 - Part 2

Correct Answer: Count for a full sixty seconds

An irregular rhythm requires a full sixty-second count to capture the variation accurately because shorter intervals may include too many or too few beats by chance. Sixty seconds gives the most reliable rate for an irregular pulse. Option a is incorrect because a ten-second count multiplied by six magnifies any irregularity in the small window into a misleading minute total. Short counts work for very regular rhythms but break down quickly when beats are spaced unpredictably. Option b is incorrect because estimation skips the actual measurement and replaces a documented number with an impression. Documented vital signs require counted measurements, not subjective sense impressions about how the pulse felt to the technician's fingers. Option c is incorrect because a fifteen-second count multiplied by four faces the same magnification problem in an irregular pulse, just with a different multiplier. The short window cannot reliably represent a full minute of an erratic rhythm.

Correct Answer: Fever or pyrexia in clinical terms

An oral temperature above one hundred point four degrees Fahrenheit is classified as fever or pyrexia, often accompanied by chills as the body raises its set point. This finding should be documented and reported when relevant to testing. Option b is incorrect because hypothermia refers to a core temperature below ninety-five degrees Fahrenheit, which is the opposite direction of the reading described. A patient with hypothermia presents with a temperature reading well below normal, not above it. Option c is incorrect because normal adult oral temperature falls between about ninety-seven point six and ninety-nine point six degrees Fahrenheit. A reading above one hundred crosses out of that normal range and into the pyrexia category instead. Option d is incorrect because hyperpyrexia is reserved for temperatures above about one hundred five point eight degrees Fahrenheit, which is a medical emergency. The patient's reading is elevated but does not reach the hyperpyrexia threshold fo

Correct Answer: Hypertension stage two by current criteria

A reading at or above one hundred forty systolic or ninety diastolic meets the criteria for hypertension stage two under current American Heart Association guidelines. This finding warrants documentation and notification to the supervising clinician. Option a is incorrect because the normal category requires systolic below one hundred twenty and diastolic below eighty. The values described sit well above both thresholds, which moves the reading well beyond the normal range. Option b is incorrect because elevated blood pressure describes systolic between one hundred twenty and one hundred twenty-nine with diastolic below eighty. The reading in question is much higher than the elevated band on both numbers. Option d is incorrect because hypotension generally refers to readings below ninety over sixty and presents with symptoms of poor perfusion. The patient described has high readings rather than low ones, so hypotension does not fit the presentation at all.

Correct Answer: Mild hypoxemia worth reporting

A reading between ninety-one and ninety-four percent is classified as mild hypoxemia and is worth reporting to the clinician before proceeding with stress testing. The finding may reflect equipment, technique, or a real respiratory issue that needs review. Option a is incorrect because normal oxygen saturation falls between ninety-five and one hundred percent on standard pulse oximetry. The reading described sits below that range and therefore does not meet the normal saturation criteria. Option b is incorrect because severe hypoxemia is defined by saturations of eighty-five percent or below and would typically present with marked distress. The reading in question is not nearly that low and does not meet the severe threshold. Option c is incorrect because carbon monoxide poisoning produces a falsely normal pulse oximetry reading rather than a clearly low one. The drop to ninety-three percent does not match the typical misleadingly high oximetry pattern seen with carbon monoxide exposur

Correct Answer: Count without informing the patient

Counting respirations without informing the patient prevents voluntary control from altering the rate, depth, or rhythm. Many technicians keep their fingers on the wrist as if still taking the pulse so the patient does not notice the shift. Option a is incorrect because telling the patient you are about to count breaths invites voluntary control of breathing rate and depth. Conscious attention changes the pattern, which corrupts the very measurement the count was meant to capture. Option c is incorrect because asking the patient to breathe slowly produces a deliberately altered rate rather than the patient's true resting respirations. The recorded number would reflect the request, not the patient's actual baseline breathing. Option d is incorrect because holding the patient's chest still prevents normal breathing and may distress the patient. Physical restriction of the chest interferes with both the count and the patient's comfort during what should be a passive me

Correct Answer: The reading is artificially high

A cuff that is too small for the arm produces a falsely high reading because more pressure is needed to compress the underlying artery completely. The wrong size shifts the numbers upward and can lead to overestimating hypertension. Option a is incorrect because a falsely low reading is associated with cuffs that are too large rather than too small. The relationship runs the other way: bigger cuffs underestimate pressure, while smaller cuffs overestimate it on the gauge. Option b is incorrect because an undersized cuff still produces a numeric reading rather than no measurement at all. Loss of all signal usually points to equipment failure, not to a sizing mismatch with the patient's arm. Option d is incorrect because a mismatched cuff size cannot produce an exactly correct reading, which is the entire reason cuff selection matters. Calling the result correct would defeat the purpose of choosing among sizes by patient arm circumference.

Correct Answer: About two to three points per second

A controlled deflation of about two to three mercury millimeters per second allows the auscultator to hear each Korotkoff phase distinctly without missing the first tapping sound. Faster or slower rates miss readings or extend cuff pressure. Option b is incorrect because deflating at about ten points per second moves the gauge too quickly to identify the first or last Korotkoff sound accurately. Rapid deflation regularly produces both systolic and diastolic numbers that are off by several points. Option c is incorrect because deflating as fast as possible prioritizes speed over accuracy and almost guarantees missed sounds during the brief window when each tap appears. Speed here is no substitute for the controlled release the method requires. Option d is incorrect because deflating at less than one point per second prolongs cuff pressure unnecessarily and causes patient discomfort. Extended compression can also alter venous return and shift later readings during the same encounter.

Correct Answer: Phase five with the disappearance of sound

In adult practice, the diastolic pressure is recorded at Korotkoff phase five, when the sounds disappear completely as cuff pressure drops below diastolic. Phase five is the standard endpoint that most adult guidelines use for diastolic measurement. Option a is incorrect because phase one marks the first tapping sound, which corresponds to systolic pressure rather than diastolic. The opening sound is the top number, not the bottom number, in the blood pressure reading. Option b is incorrect because phase two is the soft swishing sound that follows the initial tap but precedes the sharper sounds. Phase two is an interim sound and does not represent the diastolic endpoint in the adult standard. Option c is incorrect because phase three involves a return to sharp tapping sounds as the gauge continues to fall. These tapping sounds occur after phase one and before muffling but do not represent the diastolic reading in adults.

Correct Answer: On the lower leg using a thigh cuff

When neither arm can safely be used, blood pressure can be obtained on the lower leg using a properly sized thigh or large arm cuff over the popliteal artery. Lower-extremity measurement preserves both the fistula and the surgical side. Option a is incorrect because using the side of a mastectomy with lymph node removal risks lymphedema, which can be triggered by repeated cuff compression. The risk to the surgical arm is well known and routinely avoided by clinical teams. Option c is incorrect because the dialysis fistula must be protected from any blood pressure cuff inflation that could damage the access site. Fistulas represent essential vascular access for ongoing treatment and are not safe sites for pressure cuffs. Option d is incorrect because skipping a vital sign leaves a documentation gap and ignores the clinically reasonable lower-leg alternative. Available alternatives mean a reading can almost always be obtained without compromising patient safety or care.

Correct Answer: Cuff over clothing causes inaccurate reading

Placing the cuff over clothing introduces an unpredictable layer between the bladder and the arm, which distorts pressure transmission and can shift readings either direction. The cuff should be placed on a bare upper arm for accurate manual measurement. Option b is incorrect because the error described is a placement issue rather than a sizing problem. The cuff may be correctly sized while still being applied over a sleeve, so the source of the inaccuracy is different. Option c is incorrect because the scenario makes no mention of the patient talking and centers entirely on the cuff being over the clothing. The talking error exists in practice but does not match the conditions described in this scenario. Option d is incorrect because nothing in the scenario indicates the arm was held above the heart. While arm position errors do affect readings, they are not the source of inaccuracy that this scenario specifically created.

Correct Answer: Avoid caffeine for many hours beforehand

Caffeine should be avoided for at least twelve to twenty-four hours before a stress test because it interferes with pharmacologic vasodilators and may affect heart rate response. Common sources include coffee, tea, chocolate, energy drinks, and soda. Option a is incorrect because drinking extra coffee before a stress test alters heart rate response and undermines the diagnostic value of the testing. The advice runs directly opposite to the actual pre-test instruction. Option b is incorrect because continuing caffeine as usual ignores the standard pre-test instruction that nearly every facility provides to patients. Routine caffeine on test day can compromise the reliability of the result the clinician needs. Option d is incorrect because caffeine pills are simply another form of the substance being avoided and would have the same effect as a cup of coffee. The form does not matter when the active ingredient is the problem.

Correct Answer: A coronary vasodilator such as regadenoson

Pharmacologic stress tests commonly use coronary vasodilators such as regadenoson, adenosine, or dipyridamole to mimic exercise-induced demand by increasing flow to non-diseased coronary territory. These agents allow stress imaging in patients who cannot exercise. Option a is incorrect because beta-blockers like metoprolol blunt the heart rate response that stress testing is designed to evaluate. Using a beta-blocker would defeat the test rather than substitute for exercise stress in this scenario. Option b is incorrect because sodium channel blockers are antiarrhythmic agents and are not used to simulate exercise stress on the heart. The mechanism of these drugs does not produce the vasodilator response that pharmacologic stress testing requires. Option c is incorrect because long-acting nitrates relieve angina by lowering preload rather than driving the coronary flow patterns that pharmacologic stress aims to test. Nitrates may even be held to allow accurate baseline assessment befor

Correct Answer: Acute myocardial infarction within two days

An acute myocardial infarction within the past forty-eight hours is an absolute contraindication to exercise stress testing because the myocardium is still vulnerable to further injury or arrhythmia. The test should be deferred until the patient is stable. Option b is incorrect because mild seasonal allergies have no bearing on cardiac risk during stress testing. Allergies of this kind are not on any contraindication list for cardiac exercise testing in adult patients. Option c is incorrect because an old surgical scar does not pose an exercise risk and is unrelated to coronary safety during testing. Scars are anatomic findings and do not interfere with the cardiac response to exercise stress. Option d is incorrect because well-controlled diabetes is not an absolute contraindication and many such patients undergo stress testing routinely. Special preparation may be needed for medications, but the condition itself does not bar testing.

Correct Answer: Stop the test, support the patient

Moderate to severe angina paired with ischemic ST changes and central nervous system symptoms meets absolute termination criteria for stress testing. Stopping the test and supporting the patient protects against progression to a more severe cardiac event. Option a is incorrect because continuing to maximum predicted heart rate while the patient is symptomatic ignores the absolute criteria designed to prevent harm. The test is meant to stop when ischemia and symptoms appear together, not to push past them. Option b is incorrect because speeding up the treadmill increases workload at exactly the moment the patient's heart is struggling under demand. Adding stress to an ischemic heart converts a stoppable test into a much more dangerous situation. Option d is incorrect because pushing another stage despite the symptoms ignores both the patient's report and the clear physiologic warning signs on the tracing. The stress test protocol exists precisely to be halted at these signals.

Correct Answer: Max around one seventy, target around one forty-five

The age-predicted maximum heart rate is calculated as two hundred twenty minus the patient's age, which for a fifty-year-old yields about one hundred seventy. Eighty-five percent of that gives roughly one hundred forty-five as the target rate. Option a is incorrect because a maximum of two hundred would correspond to a patient around twenty years old rather than fifty. The pairing does not match the age given in the scenario and uses values for a much younger patient. Option c is incorrect because a maximum of one hundred fifty would correspond to a patient around seventy years old. The numbers are too low for someone aged fifty and would produce an underestimated target heart rate during testing. Option d is incorrect because two hundred twenty is the constant subtracted from age and is never itself a maximum heart rate. Treating two hundred twenty as the max collapses the formula and yields target values that have no clinical meaning.

Correct Answer: Avoid getting the device wet

Most standard Holter monitors are not waterproof, and getting the device wet can damage the electronics and erase recorded data. Instructions should highlight avoiding showers, baths, and swimming during the entire monitoring period. Option a is incorrect because removing the device during meals interrupts the continuous recording that the test depends on for capturing arrhythmias. Meals are typical daily activity and should occur with the device in place to make the data useful. Option b is incorrect because applying lotion under the electrodes degrades the adhesive seal and the electrical contact with the skin. Skin-care products under the electrode site directly cause the kind of artifact a Holter recording needs to avoid. Option c is incorrect because disconnecting leads when fatigued interrupts the continuous monitoring that the test depends on for symptom correlation. The diary, not unplugging, is the patient's tool for recording moments of fatigue or other symptoms.

Correct Answer: Activities, symptoms, and the times

The diary's purpose is to correlate symptoms and activities with the rhythm strip, so entries should include what the patient was doing, what symptoms occurred, and the exact times they happened. This pairing helps interpret the tracing. Option b is incorrect because weather and outdoor temperature are not part of the clinical correlation that the Holter diary supports. The cardiologist needs to know about the patient's activities and symptoms, not environmental conditions outside the patient's body. Option c is incorrect because brief notes about favorite meals offer no actionable information unless the meals are linked to symptoms or activity that the patient also recorded. Notes about food preferences alone do not help correlation with the strip. Option d is incorrect because sleep duration alone leaves out the symptom and activity content that makes the diary genuinely useful. Sleep is one valid entry but cannot be the only category for a useful Holter diary.

Correct Answer: An event monitor worn for thirty days

An event monitor worn for about thirty days records when the patient presses a button during symptoms and is well suited for infrequent palpitations. The long wear time gives several chances to capture an actual symptomatic event. Option a is incorrect because a Holter monitor records continuously for only twenty-four to forty-eight hours, which is too short for symptoms that occur infrequently. Most patients with rare events will produce no symptomatic recordings during such a brief window. Option b is incorrect because a resting twelve-lead EKG captures only a short snapshot at one moment in time. Snapshot recordings rarely catch palpitations that arise unpredictably over weeks rather than within minutes of the clinic visit. Option d is incorrect because an implantable loop recorder is reserved for the most infrequent symptoms or unexplained syncope when external monitors have failed. Implantation is far more invasive than needed when an event monitor can do the job.

Correct Answer: Wearable cardiac patch monitor

Wearable cardiac patches such as the Zio patch are single-use adhesive devices that record continuously for up to fourteen days with no lead wires. The simpler form factor improves comfort and compliance compared with traditional ambulatory devices. Option a is incorrect because an implantable loop recorder is placed under the skin and remains for up to three years, which does not match the brief adhesive patch description. Implants involve a surgical insertion the scenario clearly does not describe. Option b is incorrect because mobile cardiac outpatient telemetry transmits in near real time to a monitoring center and typically involves separate components. The transmission infrastructure does not match the simple stand-alone adhesive patch in the question. Option c is incorrect because a standard external event monitor uses lead wires and a small recorder worn for symptom-triggered captures. The description specifies a patch without lead wires, which excludes the conventional event m

Correct Answer: The teach-back method

The teach-back method has the patient explain instructions back in his own words, which lets the technician confirm understanding and correct misunderstandings before the patient leaves. It is a standard tool for verifying patient education. Option a is incorrect because SBAR is a structured communication tool used between clinicians for handoffs and urgent reports. SBAR is not designed to verify patient comprehension of discharge or home-care instructions. Option c is incorrect because a closed yes-or-no question only invites the patient to say yes without revealing whether he actually understood. A simple yes does not test the depth of understanding that a teach-back conversation reveals. Option d is incorrect because a direct command response check tests whether someone follows an order rather than whether they understood content. Command compliance is not the same as the comprehension that the teach-back method specifically targets.