Brady-dysrhythmias Flashcards
ECG patterns of sinus brady- dysrhythmias?
Rate <60.
Upright P waves in leads 1,2,3, aVF, aVL.
The aVR P wave morphology in ectopic rhythm?
It may be upright depending on the ectopic focus location.
ECG in Junctional Brady-dysrhythmia ?
Rate: 40 to 60
QRS morphology - Narrow complexes, except in the event of BBB.
ECG in Ventricular Brady-dysrhythmia ?
Rate - 20 to 40
QRS morphology - always wide complexes.
Treatment decision making in 1st degree heart block in emergency medicine?
It only required to be treated, if it is associated with bradycardia. If the ventricular rate is Normal even if the patient is hypotensive, anti dysrhythmic treatment is not indicated.
In mobitz’s type 1 or wenckebach block the PP interval should be?
Regular with progressive prolongation of PR segment with classical failure of conduction.
In mobitz’s 1 treatment decision making?
The patient needs to be treated for dysrhythmia only if his ventricular rate is Brady
Etiology of second degree heart block or mobitz’s type 1 or wenckebach block?
Either vagal or inferior wall MI.
The best first line treatment choice for mobitz’s type 1?
Anti-vagal medicine Atropine.
Mobitz’s type 2 ECG pattern?
PP intervals and PR intervals are constant. But there are dropped QRS Complexes.
Key difference between First degree vs second degree vs third degree heart block’s PR intervals
First degree: prolonged PR interval
Mobitz’s type 1: PR progressively prolongs until a conduction block
Mobitz’s type 2: PR stays the same but there are more P waves and periodically dropped QRS Complexes
Third degree heart block: The PR varies constantly with no apparent relationship between QRS and P waves
Approach to ECG of tachi-arrhythmias?
1) is the QRS Complex narrow or wide
2) are the QRS Complexes regular or irregular
3) are there P waves or atrial flutter waves.
