Difference between revisions of "ECG-ARRHYTHMIA CLASSIFICATION"

Latest revision as of 11:31, 1 January 2023

SUMMARY

1. SINUS ARRHYTHMIA: variation of the HR during respiration, particularly in young people
- Increases with inspiration due to vagal inhibition of the cardio-inhibitory area of the medulla (note: double negative) due to stretch receptors in the lungs
- Decreases in expiration

2. SICK SINUS SYNDROME: pathologies related to SA node

3. HEART BLOCK (AV nodal vs infranodal block):
a. First degree: PR interval > 0.2s
b. Second degree: Mobitz I (progressively lengthening PR interval until a QRS complex is dropped) & II (2:1, 3:1, 4:1 P waves consistently not being followed by QRS complexes)
c. Third degree: none of the P waves are conducted to the ventricles

4. SUPRAVENTRICULAR ARRHYTHMIAS:
a. Atrial flutter: circus rhythm running b/w IVC and TV causing atrial rate ~300/min commonly with 2:1 AV block
b. Atrial fibrillation: most common sustained arrhythmia, irregularly irregular ventricular response with rate 120-180/min in the absence of treatment
c. Multifocal atrial tachycardia: ECG shows atrial rate > 100/min & P waves of 3 or more distinct morphologies
d. Supraventricular tachycardia: narrow QRS complex tachycardias arising above the ventricles (key is to recognize the P wave in relation to QRS complexes)
e. Wolff-Parkinson-White syndrome: a/w an accessory/aberrant pathway (bundle of Kent) b/w atria & ventricles which bypasses the AV node & 'pre-exciting' the ventricle

5. VENTRICULAR ARRHYTHMIAS:
a. Premature ventricular contractions: premature ventricular beats with a compensatory pause
b. Ventricular tachycardia: defined as 3 or more sequential QRS complexes of ventricular origin at rate > 100/min, divided into monomorphic vs. polymorphic VT and sustained vs. non-sustained VT

@@ Line 1: / Line 1: @@
-<div><i><font color=#ff086c>1. SINUS ARRHYTHMIA:</font></i> variation of the HR during respiration, particularly in young people<br>- Increases with inspiration due to vagal inhibition of the cardio-inhibitory area of the medulla (note: double negative) due to stretch receptors in the lungs<br>- Decreases in expiration<br><br><font color=#ff086c><i>2. SICK SINUS SYNDROME:</i></font> pathologies related to SA node<br><br><i><font color=#ff086c>3. HEART BLOCK (AV nodal vs infranodal block):</font></i><br>a. First degree: PR interval &gt; 0.2s <br>b. Second degree: Mobitz I (progressively lengthening PR interval until a QRS complex is dropped) & II (2:1, 3:1, 4:1 P waves consistently not being followed by QRS complexes)<br>c. Third degree: none of the P waves are conducted to the ventricles<br><br><i><font color=#ff086c>4. SUPRAVENTRICULAR ARRHYTHMIAS:</font></i><br>a. Atrial flutter: circus rhythm running b/w IVC and TV causing atrial rate ~300/min commonly with 2:1 AV block<br>b. Atrial fibrillation: most common sustained arrhythmia, irregularly irregular ventricular response with rate 120-180/min in the absence of treatment<br>c. Multifocal atrial tachycardia: ECG shows atrial rate &gt; 100/min & P waves of 3 or more distinct morphologies<br>d. Supraventricular tachycardia: narrow QRS complex tachycardias arising above the ventricles (key is to recognize the P wave in relation to QRS complexes)<br>e. Wolff-Parkinson-White syndrome: a/w an accessory/aberrant pathway (bundle of Kent) b/w atria & ventricles which bypasses the AV node & 'pre-exciting' the ventricle <br><br><i><font color=#ff086c>5. VENTRICULAR ARRHYTHMIAS:</font></i><br>a. Premature ventricular contractions: premature ventricular beats with a compensatory pause<br>b. Ventricular tachycardia: defined as 3 or more sequential QRS complexes of ventricular origin at rate &gt; 100/min, divided into monomorphic vs. polymorphic VT and sustained vs. non-sustained VT
+===== [[Summary Article|'''SUMMARY''']] =====
+<i>1. SINUS ARRHYTHMIA:</i> variation of the HR during respiration, particularly in young people
+<br/>- Increases with inspiration due to vagal inhibition of the cardio-inhibitory area of the medulla (note: double negative) due to stretch receptors in the lungs
-==Reference(s)==
+<br/>- Decreases in expiration
-Gale, M., Grantham, H., Morley, P. and Parr, M. (2016). Advanced Life Support Level 1: 3rd Australian Edition. Australian Resuscitation Council.
+<br/>
-<br/>American College Of Surgeons. Committee On Trauma (2012). ATLS : student course manual. Chicago, Ill.: American College Of Surgeons.
+<br/><i>2. SICK SINUS SYNDROME:</i> pathologies related to SA node
+<br/>
+<br/><i>3. HEART BLOCK (AV nodal vs infranodal block):</i>
+<br/>a. First degree: PR interval &gt; 0.2s
+<br/>b. Second degree: Mobitz I (progressively lengthening PR interval until a QRS complex is dropped) &amp; II (2:1, 3:1, 4:1 P waves consistently not being followed by QRS complexes)
+<br/>c. Third degree: none of the P waves are conducted to the ventricles
+<br/>
+<br/><i>4. SUPRAVENTRICULAR ARRHYTHMIAS:</i>
+<br/>a. Atrial flutter: circus rhythm running b/w IVC and TV causing atrial rate ~300/min commonly with 2:1 AV block
+<br/>b. Atrial fibrillation: most common sustained arrhythmia, irregularly irregular ventricular response with rate 120-180/min in the absence of treatment
+<br/>c. Multifocal atrial tachycardia: ECG shows atrial rate &gt; 100/min &amp; P waves of 3 or more distinct morphologies
+<br/>d. Supraventricular tachycardia: narrow QRS complex tachycardias arising above the ventricles (key is to recognize the P wave in relation to QRS complexes)
+<br/>e. Wolff-Parkinson-White syndrome: a/w an accessory/aberrant pathway (bundle of Kent) b/w atria &amp; ventricles which bypasses the AV node &amp; 'pre-exciting' the ventricle
+<br/>
+<br/><i>5. VENTRICULAR ARRHYTHMIAS:</i>
+<br/>a. Premature ventricular contractions: premature ventricular beats with a compensatory pause
+<br/>b. Ventricular tachycardia: defined as 3 or more sequential QRS complexes of ventricular origin at rate &gt; 100/min, divided into monomorphic vs. polymorphic VT and sustained vs. non-sustained VT
 [[Category:Electrocardiogram]]
 [[Category:Advanced Life Support]]