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Cardiac Arrythmia: Overview & Classification

by Carlo Raj, MD
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    Alright. Here we go. Arrhythmias. Take a deep breath. The topic that is hot, the topic that can be complicated, but we will organise our thoughts as much as possible. And if there are certain aspects of this that you feel are overwhelming, take a deep breath and just dissect each part of this. Remember you need to know just enough where you walk into your rotation, your first year of residency or any licensing exam and you know arrhythmias well enough where you can pretty much spar with any audience. So let us begin and make you feel comfortable with the concept of arrhythmias. Now, with arrhythmias, we will first and foremost in terms of organisation, we will talk about dysrhythmias. Now as soon as we say arrhythmia, do not think that it is always sped up. It doesn’t always have to be tachy and it doesn't always have to be brady. It could either or. So, for example obviously, we will get into our AV node blocks. And we will talk about other types of tachyarrhythmias. Conduction system disease is what we are looking for. For example, last time we even introduced any type of arrhythmia with post MI. Post myocardial infarction, one of the most common causes of death or sudden death is arrhythmia. Why? The repair process in which now the wall of your heart has become disrupted is only going to disrupt the conduction system, isn't it? And so, therefore, we will then lead into some type of arrhythmia. And on the other side, we will take a look at some of those vascular diseases. The same thing. Anything that causes the disruption of the conduction system, either inheritently or secondary by disruption of your blood flow, is going to result in an arrhythmia, extremely...

    About the Lecture

    The lecture Cardiac Arrythmia: Overview & Classification by Carlo Raj, MD is from the course Arrythmias. It contains the following chapters:

    • Overview
    • Dysrhythmias and CSD
    • Review
    • The Electric System of the Heart

    Included Quiz Questions

    1. P wave
    2. QRS complex
    3. QT interval
    4. PR interval
    5. ST segment
    1. Sawtooth appearance
    2. Loss of P waves
    3. At least 3 distinctly different p wave morphologies
    4. Biphasic p wave
    5. Wavy P wave
    1. At least 3 distinctly different p wave morphologies
    2. Biphasic P wave
    3. Wavy p waves
    4. Loss of p waves
    5. Sawtooth appearance
    1. Hyperkalemia
    2. Quinidine
    3. Diphenhydramine
    4. Romano-Ward
    5. Lange-Neilsen
    1. WPW is a type of bradycardia
    2. WPW involves the presence of an abnormal pathway between the atria and ventricles
    3. AV nodal delay is shortened in WPW
    4. WPW is associated with shortened PR interval
    5. WPW results in decreased filling of the ventricles
    1. Lengthening the PR interval decreases the amount of time available for ventricular filling.
    2. Normal PR interval is between 0.12-0.2 s.
    3. The PR interval represents late diastole to the start of systole.
    4. PR interval indicates the time taken for the impulse to travel from the SA to the AV node.
    5. AV nodal block presents with a PR interval that is greater than 0.2 s.
    1. QRS complex
    2. P wave
    3. R-R segment
    4. QT interval
    5. ST segment
    1. Potassium efflux
    2. Sodium influx
    3. Sodium efflux
    4. Calcium efflux
    5. Calcium influx
    1. Late diastole
    2. Early diastole
    3. Closure of the atrioventricular valves
    4. Early systole
    5. Closure of the semilunar valves
    1. Calcium influx
    2. Sodium influx
    3. Calcium efflux
    4. Potassium efflux
    5. Potassium influx
    1. Left bundle branch block
    2. Right bundle branch block
    3. Ventricular septal defect
    4. Normal physiology on inspiration
    5. Atrial septal defect
    1. None are correct
    2. Left bundle branch block – widened split
    3. All are correct
    4. Atrial septal defect – paradoxical split
    5. Right bundle branch block – fixed split

    Author of lecture Cardiac Arrythmia: Overview & Classification

     Carlo Raj, MD

    Carlo Raj, MD


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