ALS/ACLS - Red Cross Advanced Life Support [Part 3 - Pre-Assessment] | Latest Version | 100% Pass

ALS/ACLS - Red Cross Advanced Life Support [Part 3 - Pre-Assessment] | Latest Version | 100% Pass **What part of the ECG rhythm strip represents repolarization of the ventricular myocardial cells?** - T wave **Examine the ECG strips. Which shows atrial flutter?** - Look for a strip showing "sawtooth" or "picket fence" pattern of atrial activity. **What is the heart rate in sinus tachycardia?** - Typically above 100 beats per minute (bpm). **In _________, atrial contraction occurs at such a rapid rate that discrete P waves separated by a flat baseline cannot be seen.** - Atrial fibrillation **Examine the ECG strips. Which shows third-degree AV block?** - Identify the strip where P waves and QRS complexes are completely dissociated. **What is the first-line therapy for an unstable patient with symptomatic bradycardia?** - Immediate transcutaneous pacing **Sinus bradycardia is identical to normal sinus rhythm, except the rate is less than _____ bpm.** - Less than 60 bpm **What part of the ECG rhythm strip represents the time from the beginning of atrial depolarization to the beginning of ventricular depolarization?** - PR interval **Examine the ECG strips. Which shows first-degree AV block?** - Identify the strip where every P wave is followed by a consistently prolonged PR interval. **Which statement about electrocardiography is true?** - Electrocardiography records the electrical activity of the heart.