EKG and Arrythmia Flashcards
ST elevation in leads II, III, and aVF indicate what?
An MI on the INFERIOR SURFACE of the heart
ST depression on an EKG indicates….
Ischemia
V1 to V4 leads project electrical information from which surface of the heart?
Anterior
I, aVL, V5, V6 lead abnormalities indicate a problem with which side of the heart?
Lateral surface
A complete coronary obstruction of the LAD would register on which leads of the EKG?
V1-V4 (Anterior surface of heart)
And MI involving the Right Coronary Artery (RCA) would register on which leads?
II, III, and aVF
Inferior portion of heart!
What causes the nausea and vomiting often associated with an MI on the inferior surface of the heart?
Increased Vagal Stimulation
What marks on the EKG reading represent the rhythm of the ventricles? the atria? What questions do you ask regarding rhythm?
The distance between the R peaks determines ventricular rhythm.
The distance between the p waves determines atrial rhythm.
Is the rhythm regular?
Regularly irregular?
Irregularly irregular?
How do you calculate HR from an EKG?
Count the large boxes between R peaks.
Divide 300 by that number to get the HR
What do you look for regarding P waves? (what questions should you ask when viewing them?_
Are they present?
Do they occur regularly?
Is there one P-wave for each QRS complex?
Are the P-Waves smooth, rounded, and upright?
Do all P-Waves have similar shapes?
How can you tell if the arrhythmia is atrial or ventricular?
Atrial if there is a P wave present (and abnormal)
Ventricular if there is no P wave, and/or the QRS complex has widened.
What does the QT interval represent?
The total time if ventricular activity, from depolarization, to complete repolarization
What is the most common/useful reference lead?
II –> upright and generic EKG
Most common cause of death in patients with an MI or Heart Failure?
Arrhythmias
What drug is particularly responsible for the toxicity of arrhythmia?
Digoxin /Digitalis
Inotropic drugs
