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ECG arrhythmias

Carnegie ventricular arrhythmias

QuestionAnswer
Where do ventricular beats and rhythms originate? Below the bundle of His in a pacemaker site in either the right or left ventricle.
When an impulse arises in the ventricles how does it travel? From cell to cell through the myocardium depolarizing the ventricles asynchronously
Since the ventricles are not stimulated simultaneously in ventricular arrhythmias, the stimulus spreads through the ventricles in an aberrant manner resulting in Wide QRS complex of 0.12 second or greater
Repolarization in ventricular arrhythmias result in ST segment and T waves which slope in the opposite direction from the mean QRS deflection
Is a p-wave produced in ventricular rhythms? No.
Ventricular arrhythmias include PVCs, VT, VF, idioventricular rhythm, accelerated idioventricular rhythm
The term used when the QRS complexes are of the same morphology in the same lead the same rhythm Monomorphic VT
What is the term used when the QRS complexes differ in morphology in the same lead? What is the VT called? Polymorphic VT
Treatment protocols for unstable monomorphic VT with Paul Pulse Convert the written using synchronized cardioversion beginning at 100 jewels biphasic energy dose
Torsades depois ventricular tachycardia means Twisting of the points
Treatment protocol 40d Pvt Immediate unsynchronized shock at 200 joules biphasic energy dose
Can cardioversion be used on torsades? No.
What happens in ventricular fibrillation? A disorganized chaotic electrical focus in the ventricles takes over control of the heart.
V fib With large amplitude waves is called Course vis VF
If VF waves are small, the rhythm is called Fine VF
What happens when VF occurs There is no cardiac output, peripheral pulses and blood pressure are absent, and patient becomes unconscious immediately
Treatment protocols VF If there is no pulse and the patient is unconscious, defibrillator at 200 joules biphasic. If the arrested unwitnessed, perform CPR for 5 cycles before the initial shock.
What is the rate for a do ventricular rhythm? 20 to 40 beats per minute
What is the rate for accelerated idioventricular rhythm? 50 to 100 beats per minute
Created by: ICVT2b
 

 



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