PCP Cardiac Care and ECG 2

Question 1

Atrial fibrillation on an ECG is characterized by:

Accepted Answer

Irregularly irregular RR intervals with fibrillatory baseline and no distinct P waves

Answer

Regular RR intervals with saw-tooth baseline

Answer

Regular P waves with constant PR interval

Answer

Wide QRS complexes at a rate of 300 bpm

Question 2

The classic ECG finding in hyperkalemia is:

Accepted Answer

Peaked (tent-shaped) T waves and widened QRS

Answer

Prolonged QT interval and U waves

Answer

ST elevation in all leads

Answer

Short PR interval and delta waves

Question 3

A delta wave on an ECG is associated with which condition?

Accepted Answer

Wolff-Parkinson-White (WPW) syndrome

Answer

Brugada syndrome

Answer

Hypertrophic cardiomyopathy

Answer

Long QT syndrome

Question 4

The energy used for defibrillation of ventricular fibrillation with a biphasic defibrillator is:

Accepted Answer

200 J

Answer

50 J

Answer

100 J

Answer

360 J (monophasic equivalent)

Question 5

Pulseless electrical activity (PEA) is defined as:

Accepted Answer

Organized ECG activity without a palpable pulse

Answer

Ventricular fibrillation without a palpable pulse

Answer

Complete cardiac asystole

Answer

Ventricular tachycardia with a BP of 70 mmHg

Question 6

Which reversible cause of PEA is indicated by distended neck veins, absent breath sounds, and tracheal deviation?

Accepted Answer

Tension pneumothorax

Answer

Hypovolemia

Answer

Hypothermia

Answer

Tamponade