EKG Flashcards
(35 cards)
What is depolarization?
Contraction of the myocardium
What is repolarization?
Relaxation of the cells
What is the SA node?
point of origin of electrical activity
What is the p wave?
depolarization of right and left atrium
What is the PR interval?
Beginning of atrial depolarization into ventricular depolarization
What is the QRS complex?
Depolarization of the ventricles
What is the T wave?
Beginning of ventricular repolarization
What repolarization do you not see on the EKG?
Atrial
What is sinus rhythm?
Normal cardiac rhythm
What is sinus arryhthmia?
Race increase with respiration and decrease with expiration
What is sinus bradycardia?
Decreased ventricular rate
What is sinus tachycardia?
Increased ventricular rate
What is atrial flutter?
ventricular rate differs from atrial rate
What atrial fibrillation?
No P waves present
What is PVC?
Premature ventricular contraction
How do you identify PVC?
No P wave and wide QRS complex
How do you identify Atrial Premature contraction
PR interval varies
How do you identify Ventricular Tachycardia?
4 or more PVCs in a row
What is ventricular fibrillation?
Mechanical pumping of the heart not evident
How do you identify v fib?
No recognizable p wave of QRS complex
What will happen with v fib?
Heart will arrest
What is a first degree av block?
Minor heart block
How do you identify a first degree av block
PR interval is long
What is a second degree av block?
Dropped heart beats
