Rhythm Practice Tests Rhythm Practice Tests 1 / 30 The ECG shows a gradual increase in the heart rate over time. What rhythm is this? Sinus tachycardia with sinus acceleration Atrial fibrillation Premature ventricular contraction (PVC) Sinus rhythm (normal) 2 / 30 The ECG shows a repeating pattern of a dropped QRS complex for every three P waves. What rhythm is this? Sinus rhythm (normal) Second-degree heart block (3:1) Premature ventricular contraction (PVC) Tachycardia 3 / 30 The ECG shows a repeating pattern of a wide QRS complex followed by a smaller deflection, but unlike PAC with aberrancy, the P wave is buried within the QRS complex. What rhythm is this? Premature atrial contraction (PAC) with block Sinus rhythm (normal) Premature ventricular contraction (PVC) Bundle branch block 4 / 30 The ECG shows a repeating pattern of rapid, fluttering waves in the atria without distinct P waves. What rhythm is this? Sinus rhythm (normal) Atrial flutter Premature ventricular contraction (PVC) Tachycardia 5 / 30 The ECG shows a repeating pattern of three premature beats followed by a normal beat. What rhythm is this? Sinus rhythm (normal) Ventricular trigeminy Premature ventricular contraction (PVC) Bradycardia 6 / 30 The ECG shows alternating narrow and wide QRS complexes with normal P waves preceding each. What rhythm is this? Sinus rhythm (normal) Bigemini (premature ventricular contractions alternating with normal beats) Premature atrial contraction (PAC) Tachycardia 7 / 30 The ECG shows a gradual slowing of the heart rate over time. What rhythm is this? Sinus bradycardia with sinus arrest Atrial fibrillation Premature ventricular contraction (PVC) Sinus rhythm (normal) 8 / 30 The ECG shows very rapid heart rate with irregular P waves and irregularly shaped QRS complexes. What rhythm is this? Sinus tachycardia Atrial fibrillation with a rapid ventricular response Premature ventricular contraction (PVC) Tachycardia 9 / 30 The ECG shows very rapid heart rate with regular P waves preceding each narrow QRS complex. What rhythm is this? Sinus tachycardia Atrial fibrillation Premature ventricular contraction (PVC) Bradycardia 10 / 30 The ECG shows a repeating pattern of no QRS complex following every P wave. What rhythm is this? Sinus rhythm (normal) Third-degree heart block (complete heart block) Premature ventricular contraction (PVC) Tachycardia 11 / 30 The ECG shows a repeating pattern of a dropped QRS complex for every two P waves. What rhythm is this? Sinus rhythm (normal) Second-degree heart block (2:1) Premature ventricular contraction (PVC) Bradycardia 12 / 30 Which condition is often treated with the administration of magnesium sulfate? Atrial fibrillation Torsades de pointes Sinus bradycardia Pulseless electrical activity 13 / 30 Which of the following rhythms may require immediate transcutaneous pacing? Atrial fibrillation Sinus tachycardia Complete heart block (third-degree AV block) Ventricular fibrillation 14 / 30 The ECG shows a repeating pattern of a dropped QRS complex after a normal P wave. What rhythm is this? Sinus rhythm (normal) First-degree heart block Premature ventricular contraction (PVC) Tachycardia 15 / 30 Which rhythm is described by a regular wide QRS complex with a heart rate of 100-250 beats per minute? Atrial flutter Ventricular tachycardia Sinus tachycardia Atrial fibrillation 16 / 30 The ECG shows a repeating pattern of a wide QRS complex followed by a smaller deflection. What rhythm is this? Sinus rhythm (normal) PAC with aberrancy (early activation of ventricles) Premature ventricular contraction (PVC) Heart block 17 / 30 Which rhythm is characterized by rapid and irregular electrical activity with no identifiable P waves? Atrial flutter Ventricular tachycardia Atrial fibrillation Sinus bradycardia 18 / 30 What is the primary goal when treating a patient with bradycardia and signs of poor perfusion? Initiate transcutaneous pacing Administer amiodarone Defibrillate immediately Start CPR 19 / 30 The ECG shows no discernible P waves, with irregular and wide QRS complexes. What rhythm is this? Sinus rhythm (normal) Ventricular fibrillation Premature ventricular contraction (PVC) Bradycardia 20 / 30 Which rhythm often presents with a narrow QRS complex and a rate greater than 150 beats per minute? Ventricular tachycardia Atrial fibrillation Supraventricular tachycardia Sinus tachycardia 21 / 30 The ECG shows very slow heart rate with a P wave preceding each narrow QRS complex. What rhythm is this? Sinus rhythm (normal) Atrial fibrillation Bradycardia Tachycardia 22 / 30 Which rhythm is characterized by a sawtooth pattern on the ECG? Atrial fibrillation Atrial flutter Ventricular tachycardia Sinus tachycardia 23 / 30 The ECG shows a single premature beat with a wide and bizarre QRS complex originating from the ventricles. What rhythm is this? Sinus rhythm (normal) Atrial fibrillation Premature ventricular contraction (PVC) Heart block 24 / 30 Which of the following is NOT a shockable rhythm? Ventricular fibrillation Pulseless ventricular tachycardia Asystole Supraventricular tachycardia 25 / 30 The ECG shows irregular P waves with irregularly shaped QRS complexes at a rapid rate. What rhythm is this? Sinus rhythm (normal) Atrial fibrillation Premature ventricular contraction (PVC) Tachycardia 26 / 30 What is the first drug administered in most cases of cardiac arrest? Atropine Amiodarone Epinephrine Lidocaine 27 / 30 The ECG shows regular P waves followed by normal QRS complexes at a rate of 75 beats per minute. What rhythm is this? Sinus rhythm (normal) Atrial fibrillation Premature ventricular contraction (PVC) Bradycardia 28 / 30 Which rhythm is commonly treated with synchronized cardioversion? Asystole Atrial fibrillation Atrial fibrillation Pulseless electrical activity 29 / 30 What is the most effective treatment for ventricular fibrillation? CPR only Administration of epinephrine Defibrillation Atropine administration 30 / 30 Which rhythm is characterized by a complete absence of electrical activity in the heart? Ventricular fibrillation Pulseless electrical activity Asystole Atrial fibrillation Your score is
