2026/2027 (Complete Practice Test for EMS Certification Review)
Instant Pdf — 196 Questions and Answers Already Graded A+
Premium Exam Tested And Verified
Page 1
,1. A patient with a history of end-stage renal disease on hemodialysis presents with
acute dyspnea and hypotension. The ECG shows a widened QRS complex and
peaked T waves. Which of the following is the most immediate therapeutic
intervention?
A. Administer 1 gram of calcium gluconate intravenously.
B. Initiate continuous positive airway pressure (CPAP) at 10 cm H2O.
C. Administer 50 mEq of sodium bicarbonate intravenously.
D. Start intravenous normal saline bolus at 20 mL/kg.
Answer: A. Administer 1 gram of calcium gluconate intravenously.
The patient presents with hyperkalemia (renal failure, peaked T waves, widened QRS).
Calcium gluconate stabilizes the cardiac membrane and is the first-line treatment for
life-threatening hyperkalemia. CPAP addresses pulmonary edema but does not correct
potassium. Sodium bicarbonate is a second-line agent. Saline bolus may worsen volume
overload.
2. Which of the following best explains why beta-blockers are relatively
contraindicated in patients with acute decompensated heart failure (ADHF) and
pulmonary edema?
A. Beta-blockers increase systemic vascular resistance, worsening afterload.
B. Beta-blockers reduce myocardial contractility, which can exacerbate low cardiac output.
C. Beta-blockers cause bronchospasm, directly worsening pulmonary edema.
D. Beta-blockers inhibit renal sodium excretion, leading to fluid retention.
Answer: B. Beta-blockers reduce myocardial contractility, which can exacerbate
low cardiac output.
In ADHF, cardiac output is already compromised. Beta-blockers depress myocardial
contractility and heart rate, further reducing cardiac output and potentially causing
cardiogenic shock. While beta-blockers may increase SVR initially, the primary
concern is negative inotropy. Bronchospasm is a concern in asthma, not pulmonary
edema. Fluid retention is not a direct acute effect.
Page 2
,3. A patient is found unresponsive with a blood glucose of 32 mg/dL. After
establishing IV access, you administer 1 amp of D50 (25 grams dextrose). The
patient becomes responsive but then seizes. What is the most likely explanation for
this seizure?
A. Rebound hypoglycemia due to excessive insulin release stimulated by dextrose.
B. Cerebral edema caused by rapid osmotic shift of water into brain cells.
C. Acute hyperglycemia-induced hyponatremia leading to neuronal irritability.
D. Withdrawal from chronic alcohol consumption unmasked by glucose administration.
Answer: B. Cerebral edema caused by rapid osmotic shift of water into brain cells.
Rapid correction of severe hypoglycemia can cause osmotic demyelination and cerebral
edema, particularly in patients with chronic hypoglycemia or malnutrition. The sudden
increase in extracellular glucose draws water into brain cells, leading to edema and
seizures. Rebound hypoglycemia is less likely. Hyperglycemia-induced hyponatremia is
not acute. Alcohol withdrawal is possible but not directly due to dextrose.
4. In a patient with suspected acute coronary syndrome, which electrocardiographic
finding is most indicative of an acute posterior wall myocardial infarction?
A. ST-segment depression in leads V1 and V2 with tall R waves.
B. ST-segment elevation in leads II, III, and aVF.
C. New left bundle branch block.
D. ST-segment elevation in leads V3 and V4 with Q waves.
Answer: A. ST-segment depression in leads V1 and V2 with tall R waves.
Posterior MI often presents with ST depression in anterior leads (V1-V3) and tall R
waves due to reciprocal changes. ST elevation in II, III, aVF indicates inferior MI.
LBBB is not specific. ST elevation in V3-V4 indicates anterior MI.
Page 3
, 5. A 55-year-old patient with a history of hypertension and diabetes presents with
sudden onset of severe tearing chest pain radiating to the back, and a blood pressure
difference of 30 mmHg between arms. Which of the following is the most
appropriate prehospital management?
A. Administer aspirin, nitroglycerin, and morphine for pain control.
B. Rapid sequence intubation and mechanical ventilation.
C. Initiate beta-blocker therapy to reduce heart rate and blood pressure.
D. Start intravenous fluids to maintain mean arterial pressure above 65 mmHg.
Answer: C. Initiate beta-blocker therapy to reduce heart rate and blood pressure.
The presentation suggests aortic dissection. Beta-blockers reduce heart rate and blood
pressure, decreasing aortic wall stress. Aspirin and nitroglycerin may worsen bleeding
or hypotension. Intubation is not initially indicated. Fluids may exacerbate
hypertension and dissection propagation.
6. A patient with a history of asthma presents with severe respiratory distress,
audible wheezing, and use of accessory muscles. Initial peak expiratory flow rate
(PEFR) is 40% of predicted. After three albuterol nebulizer treatments, PEFR
improves to 50% and wheezing decreases. However, the patient remains tachypneic
and oxygen saturation is 90% on 100% non-rebreather. What is the most
appropriate next step?
A. Administer intravenous magnesium sulfate.
B. Start continuous positive airway pressure (CPAP).
C. Administer epinephrine intramuscularly.
D. Obtain a chest X-ray to rule out pneumothorax.
Answer: A. Administer intravenous magnesium sulfate.
This patient has severe acute asthma exacerbation with poor response to initial
bronchodilators. IV magnesium sulfate is a second-line treatment that acts as a smooth
muscle relaxant. CPAP is not typically first-line in asthma and may cause air trapping.
Epinephrine IM is reserved for anaphylaxis or impending respiratory arrest. Chest
X-ray may be considered but is not the next step.
Page 4