Sinus-, Vorhof- und ventrikulärer Rhythmus
Über den Vortrag
Der Vortrag „Sinus-, Vorhof- und ventrikulärer Rhythmus“ von Joseph Alpert, MD ist Bestandteil des Kurses „Herzrhythmusstörungen“.
Quiz zum Vortrag
Which of the following can appear as bigeminy on the ECG?
- Premature atrial contractions
- Left bundle branch block
- Atrioventricular re-entry tachycardia
- Atrial fibrillation
- Sinus bradycardia
Approximately what percentage of people over the age of 80 have atrial fibrillation?
- 10%
- 20%
- 30%
- 40%
- 50%
A saw-tooth appearance on the ECG is typically seen in which of the following cardiac arrhythmias?
- Atrial flutter
- Sinus tachycardia
- Ventricular fibrillation
- Atrial fibrillation
- Premature atrial contraction
Atrial flutter can often degenerate into which of the following cardiac arrhythmias?
- Atrial fibrillation
- Ventricular fibrillation
- Premature atrial contraction
- Ventricular tachycardia
- Sinus tachycardia
In the case of ventricular fibrillation, blood is no longer pumped out of the heart. In such a case, how long does it take for cell death to begin within brain neurons?
- 4-5 minutes
- < 1 minute
- 8-10 minutes
- 15-20 minutes
- > 30 minutes
Which of the following findings on an ECG is characteristic of a sinus rhythm?
- One upright, uniform P wave before every QRS
- Wide QRS complexes
- Tall peaked T waves after every QRS
- A baseline of indiscernible P waves
- "Sawtooth" appearance of the P waves preceding every QRS
Why is there a grossly irregular ventricular rhythm seen in atrial fibrillation?
- Random transduction through the AV node
- Rapid circular conduction of electrical signals around the atrium
- Electrical signals originate below the AV node
- Premature depolarization of cardiac cells
- Conduction of electrical signals through accessory tracts
What finding on ECG may help a clinician identify electrical activity originating from the ventricles?
- Wide QRS complex
- Narrow QRS complex
- Long PR interval
- Rate >100
- Dropped QRS complex
Dozent des Vortrages Sinus-, Vorhof- und ventrikulärer Rhythmus
Joseph Alpert, MD
Dr. Joseph Alpert is the Professor of Medicine in the Department of Medicine, Director of Coronary Care and Medical Director of Cardiac Rehabilitation at the University of Arizona (UA) College of Medicine, USA.
He obtained his Medical Degree cum laude from Harvard Medical School in 1969. Currently, he is a member of the Board of Trustees of the Association of Professors of Medicine, and Editor-in-Chief of The American Journal of Medicine.
Due to his achievements, he earned the Gifted Teacher Award from the American College of Cardiology in 2004.
Within Lecturio, Dr. Alpert teaches courses on Cardiology and the Cardiac System.
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