10 free AEMT practice questions: Cardiac Monitoring and Rhythm Recognition

Check the carotid pulse for up to 10 seconds before doing anything else: A pulse check feels like the logical way to find out whether the no shock advisory means a perfusing rhythm. Even a heart that has just been restarted usually needs a period of perfusion before it makes a pulse you can feel, so an early check tends to find nothing while costing you the pressure you built. The scheduled check two minutes from now answers the same question at no cost.

Reposition the pads and run a second analysis before touching the patient: Pad placement is worth a look when a device behaves unexpectedly, and repositioning sounds harmless. A no shock advisory is a result, not a malfunction. Running a second analysis doubles the pause and delays the one treatment that is clearly indicated.

Deliver 30 seconds of ventilations, then resume chest compressions: Ventilations matter, and a patient who has been down needs oxygen. Breathing for a patient whose blood is not moving does not get that oxygen anywhere. Compressions come first, and ventilations fold into the cycle around them.

V3 is optional on a field tracing and is added once the first five are clean: Field tracings do get abbreviated in some settings, which makes an optional lead sound plausible. A 12-lead needs all twelve leads to be a 12-lead, and V3 covers territory the others do not. Leaving it off changes what the receiving physician can see.

V3 sits over the sternum, so it is placed last to avoid shifting the others: Something has to explain the odd ordering, and a crowded sternal area is a reasonable guess. V1 and V2 are the electrodes beside the sternum; V3 sits out between V2 and V4, well off the bone. Placement order is about measurement, not about bumping neighbors.

V3 shares a cable with the left arm electrode and follows the limb leads: Cable colors and groupings do get memorized during skills training, so a wiring explanation has some pull. The precordial electrodes each have their own lead wire and none of them shares with a limb electrode. The sequence comes from anatomy, not from the cable set.

Apply the AED pads and let the device analyze before moving the patient: The rhythm is fast and wide and the patient looks terrible, so reaching for the device that shocks feels right. The AED cannot tell that the patient has a pulse, and an unsynchronized shock delivered to a perfusing patient can drop the patient into a worse rhythm than the one the patient is in. The device belongs on a patient who is unresponsive, apneic, and pulseless.

Give aspirin and sublingual nitroglycerin en route for the chest tightness: Chest tightness in a pale, diaphoretic patient does look like acute coronary syndrome, and that protocol is one you run often. Nitroglycerin at a systolic of 78 mmHg removes preload from a patient who has almost none, and the chest tightness here is coming from a rate too fast to let the ventricles fill. Treating the symptom does not touch the cause.

Give a 20 mL/kg crystalloid bolus en route to raise the blood pressure: Hypotension often does mean an empty tank, and fluid is one of the few pressure tools you carry. This tank is not empty; the ventricles are simply not getting time to fill at 190 beats per minute. Volume pushed into a heart that cannot fill does not raise the output.

Place the pad directly over the patch to avoid delay: Time is the currency in an arrest, and pulling a patch feels like a detour. The patch blocks contact and can arc at the pad edge, so the shock you delayed nothing to deliver may not reach the heart. Removing it takes a couple of seconds.

Place the pad two inches below the patch and analyze: Moving off the obstruction keeps the patch out of the way without spending time, which is the appeal. Sliding a pad down two inches puts it off the landmark, and pad position is what sets the current path through the chest. The landmark matters more than the convenience.

Leave the patch and use anteroposterior placement instead: Anteroposterior placement is a legitimate alternative, so using it here looks resourceful. It exists for chests too small to keep pads apart, not as a way to avoid removing something. Standard placement works fine once the patch is off.

On the chest and abdomen, where the torso holds them still: Tempting because torso placement genuinely does cut motion artifact, and you have seen a modified torso placement used for continuous monitoring on a long transport. Wrong because moving the limb electrodes onto the torso changes the tracing itself, and the receiving physician is comparing it against a standard placement.

On the wrists and ankles, directly over the bone so they lie flat: Tempting because the wrist and the ankle are the classic diagram positions and a flat bony surface feels like a stable place to stick something. Wrong because an electrode sitting directly over a bony prominence makes poor skin contact, and poor contact is one of the most common sources of a noisy trace.

On the upper arms and upper thighs, over the largest muscle bellies available: Tempting because a bigger muscle sounds like a stronger signal, and the upper arm and thigh are certainly fleshy. Wrong because large muscle groups are exactly what generates motion artifact, and this patient is moving, so you are placing the electrode on the noisiest tissue available.

Because V3 sits over the sternum and the other electrodes must be clear of it: Tempting because V1 and V2 do sit right beside the sternum and crowding near the sternal border is a real placement worry. Wrong because V3 does not sit over the sternum at all, it sits out on the chest wall between V2 and V4, and nothing about the sternum drives the placement order.

Because V3 is optional on a standard tracing and is added only when time allows: Tempting because a hurried crew sometimes does skip a lead, and you have seen tracings come in with a lead missing. Wrong because all six precordial leads are part of a standard 12-lead, and a tracing missing V3 is an incomplete tracing rather than a faster one.

Because V3 must sit one space lower than V4 to capture the inferior wall: Tempting because V3 is numbered before V4 and it feels like the numbers should walk down the chest in order. Wrong because V3 sits between V2 and V4 at an intermediate level rather than below V4, and the inferior wall is looked at by the limb leads rather than by a precordial electrode.

Resume compressions and repeat the AED analysis in one minute rather than two: Tempting because a rhythm that changed feels like it deserves a fresh look, and shortening the cycle sounds attentive. Wrong because cutting the cycle short adds a pause, and perfusion pressure builds over a cycle and collapses the moment compressions stop.

Hold compressions and recheck the carotid pulse for another ten seconds: Tempting because a slow organized rhythm makes you want to be certain you did not miss a weak pulse. Wrong because ten seconds is the limit and you have already used it, and a provider not certain of a pulse within that window compresses rather than keeps searching.

Resume compressions and prepare to shock at the next analysis, since the rhythm is organized: Tempting because the rhythm looks organized and the last shockable rhythm you saw also had complexes on the screen. Wrong because shockable is decided by the pattern rather than by how neat it looks, and an organized rhythm without a pulse is the definition of the pattern that is not shockable.

Detailed identification of ST-segment elevation and infarct localization: Locating an infarct is what a 12-lead is for, and it works because the additional leads view the heart from different angles, which is how ST elevation gets assigned to a wall such as inferior, anterior, or lateral. Three or four electrodes cannot generate those angles, so the information is not there to read. AEMTs do acquire and transmit 12-leads; the line falls between acquiring one and interpreting it, and interpretation sits at the Paramedic level.

Definitive differentiation between all types of supraventricular tachycardia: Separating one narrow-complex tachycardia from another takes a 12-lead, and often more than that once the patient is in the hospital. A single continuous view is enough to say narrow, fast, and regular, which is genuinely useful and shapes the AEMT's next move. It is not enough to name which supraventricular rhythm it is, and that naming sits beyond both the device and the scope level.

Precise axis determination for cardiac diagnosis: Axis is simply the overall direction the electrical impulse travels through the heart, and determining a direction requires comparing views taken from more than one angle, which is why it comes off the limb leads of a 12-lead. A single continuous view has no second angle to compare against. It fails for the same reason as the infarct-localization option, asking a device with one perspective to answer a question that needs several, at a scope level above AEMT.

Transmit the tracing and note the placement used: Documenting a nonstandard placement is the right move when standard placement is genuinely impossible: a burn, a dressing, or a wound occupying the site, because the reader then knows how to weigh the tracing. Nothing in this question prevents correct placement; the electrodes are simply in the wrong spot. A note does not restore the missing information, and the key produces a tracing that needs no asterisk in the first place.

Move V1 and V2 to the midclavicular line: The midclavicular line is a real landmark on this chest, just not for these leads: V4 sits in the fifth intercostal space at the left midclavicular line, and V5 and V6 continue laterally from there. Moving V1 and V2 out to the midclavicular line abandons the septal view entirely and crowds them into the lateral leads' territory. The key returns each electrode to its own landmark rather than swapping in a different lead's.

Read the tracing before deciding whether to repeat it: Reading the tracing first is how a provider who interprets decides whether an artifact matters, and interpretation is outside AEMT scope, which is half of why this fails. The other half applies at every level: once you know an electrode was misplaced, the tracing cannot be trusted to tell you whether the misplacement mattered. The key fixes the known defect and produces data worth transmitting instead of reasoning around bad data.

Check the carotid pulse for up to 10 seconds: A student picks this because they think every shock is followed by a pulse check to find out whether it worked. A pulse check belongs after a no-shock-advised message or when the device prompts one; after a delivered shock the next two minutes are compressions, because a heart that has just been defibrillated rarely produces a palpable pulse right away and the search for one costs the perfusion that would let it recover.

Reanalyze the rhythm with the defibrillator: A student picks this because they think stacking analyses catches the moment the rhythm becomes shockable again. The device reanalyzes after the two-minute compression cycle; running analyses back to back stretches a pause during which no blood is moving and delays the intervention that makes the next shock more likely to work.

Deliver two ventilations, then reassess: A student picks this because they think airway and breathing come before circulation in every sequence. The question states compressions were already interrupted for the analysis and the shock, so the immediate need is perfusion; ventilations are delivered within the compression cycle rather than ahead of it.