EKG Findings Flashcards
What condition is associated with electrical alternans?
Pericardial effusion
S1Q3T3
Acute right heart strain with an S wave in lead I
Q wave in lead III
Inverted T wave in lead III
Meaning PE
What is electrical alternans?
QRS complexes whose amplitudes vary from beat to beat on EKG due to the heart swinging back and forth in the increased amount of fluid
When is the PR interval prolonged?
In first degree heart block
What does the presence of an F wave mean?
Atrial flutter
What does the presence of a delta wave mean?
The patient has an accessory conduction pathway like WPW
What should you think of with a new onset RBB?
PE
What the EKG findings of A-fib
Absent p waves
Irregularly irregular rhythm
Sometimes VT
Narrow QRS complexes
What are the normal findings on an EKG of a newborn?
Right axis deviation
R waves in the precordial leads (v1-3)
Because in the normal fetus blood is shunted away from the lungs and systemic blood flow relies on the right heart
EKG findings in tricuspid atresia?
Left axis deviation
Small or absent R Waves
Tall peaked p waves because of ASD (increased blood flow between the atria
What are the EKG findings of Ebstein’s anomaly?
Peaked p waves from increased flow across tricuspid due to tricuspid regurgitation from floppy valve.
Right axis deviation due to increased blood flow
What are the EKG findings of TOF?
Right axis deviation
What are the EKG findings in total anomalous pulmonary venous return?
Right axis deviation
RVH
Normal PR interval?
Between 120 and 200 msec
Normal QRS?
Less than 120
Left bundle branch block?
QRS greater than 120 secs
No R wave in V1
Tall R wave in V1, V5, V6
RBBB.
QRS greater than 120 seconds
RSR’
Wide R wave in V1
Wide S wave n I, V5, V6
Long QT syndrome
QTc is greater than 440 msec
New inverted T waves indicates what?
Ischemia
What do Q waves signify?
Transmural infarct
What EKG findings indicate right atrial enlargement?
P wave greater than 2.5 mm in lead II
What EKG findings indicate left atrial enlargement?
P wave width in lead II greater than 120ms
Terminal negative deflection in V1 is greater than 1 mm and 40 msec in duration
Notched P waves (look like M)
What does LVH look like on EKG.
The amplitude of S in V1 and R in V5 or V6 is greater than 35 mm
What does RVH look like on EKG?
Right axis deviation (QRS is down in lead I and positive in aVF)
And R wave in V1 is greater than 7 mm
