AEMCA - Advanced Emergency Medical Care Assistant Cardiovascular Emergencies Questions and Answers — Questions and Answers
Question 1: A 68-year-old male presents with sudden onset of severe tearing chest pain that radiates to his back. He has a history of uncontrolled hypertension. His vital signs are BP 210/110 mmHg, HR 110 bpm, and RR 22 breaths/min. There is a noticeable difference in blood pressure between his right and left arms. Which of the following conditions is most likely?
- Acute Myocardial Infarction
- Pulmonary Embolism
- Aortic Dissection (Correct answer)
- Pericarditis
Correct answer: Aortic Dissection
The classic presentation of an aortic dissection includes a sudden onset of severe, tearing or ripping chest pain that often radiates to the back, between the shoulder blades. A significant finding is a variation in blood pressure between the arms. The patient's history of uncontrolled hypertension is a major risk factor.
Question 2: You are treating a 75-year-old female with a history of congestive heart failure (CHF) who presents with severe dyspnea, crackles in all lung fields, and pitting edema in her lower extremities. Which of the following prehospital interventions is most appropriate for managing her acute pulmonary edema?
- Administering a 500 mL normal saline fluid bolus
- Placing the patient in a supine position
- Administering nitroglycerin and applying Continuous Positive Airway Pressure (CPAP) (Correct answer)
- Preparing for immediate defibrillation
Correct answer: Administering nitroglycerin and applying Continuous Positive Airway Pressure (CPAP)
For a patient with acute cardiogenic pulmonary edema secondary to CHF, the treatment goals are to reduce preload and afterload and improve oxygenation. Nitroglycerin is a vasodilator that reduces preload, and CPAP provides continuous pressure to keep alveoli open, improving gas exchange by pushing fluid out of the alveolar space.
Question 3: According to the Ontario Advanced Life Support Patient Care Standards (ALS PCS), which of the following is a primary indication for administering Acetylsalicylic Acid (ASA) in the prehospital setting?
- Symptomatic bradycardia
- Chest pain or discomfort suggestive of acute coronary syndrome (ACS) (Correct answer)
- Hypertensive emergency with a systolic BP > 180 mmHg
- Confirmed diagnosis of pericarditis
Correct answer: Chest pain or discomfort suggestive of acute coronary syndrome (ACS)
ASA is an antiplatelet agent crucial in the early management of Acute Coronary Syndrome (ACS). Its primary role is to prevent the aggregation of platelets, which can worsen an occlusion in a coronary artery. Ontario guidelines specify its use for patients with chest pain or discomfort suggestive of ACS, unless contraindicated.
Question 4: A 55-year-old male is found to be in a perfusing, wide-complex bradycardia with a heart rate of 38 bpm. He is pale, diaphoretic, and has a blood pressure of 80/50 mmHg. According to AEMCA-level protocols, which intervention should be prioritized after establishing IV access and administering oxygen?
- Administering a 1 mg dose of epinephrine
- Preparing for synchronized cardioversion
- Administering Atropine 0.5 mg IV
- Immediate application and initiation of transcutaneous pacing (TCP) (Correct answer)
Correct answer: Immediate application and initiation of transcutaneous pacing (TCP)
In a patient with symptomatic, unstable bradycardia, particularly with a wide QRS complex or high-degree AV block, transcutaneous pacing (TCP) is the treatment of choice and should not be delayed. While Atropine may be considered, it is often ineffective in wide-complex bradycardias or high-degree blocks, making TCP the more definitive and immediate treatment.
Question 5: Which of the following defines a hypertensive emergency, distinguishing it from hypertensive urgency?
- A systolic blood pressure greater than 220 mmHg.
- The presence of acute end-organ damage. (Correct answer)
- A diastolic blood pressure greater than 120 mmHg.
- Symptoms such as headache and anxiety.
Correct answer: The presence of acute end-organ damage.
A hypertensive emergency is defined by a severe elevation in blood pressure (e.g., SBP >180 or DBP >120) that is associated with evidence of new or worsening target end-organ damage, such as stroke, myocardial infarction, acute renal failure, or pulmonary edema. Hypertensive urgency involves a similar BP elevation but without the acute end-organ damage.
Question 6: You are assessing a patient with suspected Acute Coronary Syndrome. Which of the following 12-lead ECG findings is most indicative of a STEMI (ST-Segment Elevation Myocardial Infarction) requiring immediate reperfusion therapy?
- ST-segment depression in leads V1-V4
- Presence of a pathological Q-wave
- Peaked T-waves in precordial leads
- ST-segment elevation of 2 mm or more in two contiguous leads (Correct answer)
Correct answer: ST-segment elevation of 2 mm or more in two contiguous leads
The diagnostic criteria for a STEMI on a 12-lead ECG is significant ST-segment elevation in two or more anatomically contiguous leads. This finding indicates a full-thickness myocardial injury and is a critical indicator for activating cardiac catheterization lab protocols for reperfusion.
AEMCA - Advanced Emergency Medical Care Assistant Cardiovascular Emergencies Questions and Answers
A 68-year-old male presents with sudden onset of severe tearing chest pain that radiates to his back.
He has a history of uncontrolled hypertension.
His vital signs are BP 210/110 mmHg, HR 110 bpm, and RR 22 breaths/min.
There is a noticeable difference in blood pressure between his right and left arms.
Which of the following conditions is most likely?