EKG Ventricular Rhythms | Study Guide, Practice Questions & Exam Review

EKG- ventricular rhythms
EKG- ventricular rhythms
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1. Ventricles as
Pacemaker



2. What Makes a •Originates somewhere in the ventricles
Rhythm "Ventric- •Inherent Ventricular Rate: 20-40/min
ular"?




3. What Do We See •Rate/Rhythm vary
on EKG? -Usually regular

•P waves: absent
•QRS: wide (<0.12 sec)
•ST segment/T waves: discordant (goes in opposite direction as QRS)




4. What are the Ven- •Premature Ventricular Contractions (PVCs)
tricular Rhythms? •Ventricular Escape Beat
•Idioventricular Rhythm (Ventricular escape rhythm)
•Accelerated Idioventricular Rhythm
•Ventricular tachycardia
•Torsades de Pointes
•Ventricular flutter
•Ventricular fibrillation
•Agonal rhythm
•Pulseless electrical activity
•Asystole



, EKG- ventricular rhythms
EKG- ventricular rhythms
Study online at https://quizlet.com/_durhon

5. Premature Ven- •Irritable focus within the ventricles fires and produces an early (premature)
tricular Contrac- ventricular beat
tions (PVCs) •Easy to ID because of their "wide and bizarre" appearance
•Usually go in opposite direction as normal QRS




6. Premature Ven- Low Oxygen:
tricular Con- •Airway obstruction
tractions (PVCs): •Absence of air (near-drowning or suffocation)
causes •Air with poor O2 content
•PE, pneumothorax
•Hypovolemic/cardiogenic shock
•CAD, MI

Low K+
Heart pathology:
•Mitral valve prolapse, myocarditis



7. Premature Ven- •Normally the entire endocardium of both ventricles will depolarize at once, mak-
tricular Con- ing a narrow QRS
tractions (PVCs): •With PVCs, the area that is irritable will depolarize before the rest of the ventricle,
physiology then depolarizes over to other ventricle, producing a wide, bizarre QRS




8.