CRAT exam: ECG Interpretation
7 steps, analyzing 12 lead ECG
1. Determine ECG rhythm or regularity
2. Determine atrial ventricular rate.
3. Identify a P-wave morphology.
4. Measure the PR interval.
5. Measure the QRS duration, analyze the morphology.
6. Evaluate the leads in groups.
7. Identify the morphological changes.
12 lead ECG reading BIG LIE, LITTLE LIE, SAY, ALL
Big LIE
I: lateral
II: inferior
III: inferior
LITTLE LIE
aVR: not used for MI interpretation. Useful for dextrocardia and limb lead reversal.
aVL: lateral
aVF: inferior
SAY
V1: septum
V2: septum
V3: anterior
ALL
V4: anterior
V5: lateral
V6: lateral
Leads: II, III, aVF: show Ischemia, injury, & infarction where?
1. Inferior wall of left ventricle:
2. Right coronary - marginal branch:
Intercostal space (ICS)
the space between two ribs
Leads: V1 & V2: Std 12 lead Views: Ischemia, injury, & infarction:
1. Septal wall:
2. Left coronary - septal branch.
, Leads: V3 & V4: Std 12 lead Views: Ischemia, injury, & infarction:
1. Anterior wall of left ventricle.
2. Left coronary - left anterior descending branch.
Leads: I, aVL, V5 & V6: Std 12 lead Views: Ischemia, injury, & infarction:
1. Lateral wall of left ventricle.
2. Left coronary - left circumflex branch.
Anterior
Toward the front of the body; ventral
Caudal
Below, behind,directed toward or situated in or near the tail or posterior part of the body
coronal plane
divides body into front (ventral) and back (dorsal) parts. Frontal plane.
Cranial
toward the head (superior)
deep
Inward from a point of attachment, or away from the surface of the body
Distal
Farther away from a point of attachment, or from the center of the body
Dorsal
toward the back (posterior)
external
Outward or movement towards the exterior of a hollow form
frontal plane
Divides the body into front (ventral) and back (dorsal) parts; coronal plane
7 steps, analyzing 12 lead ECG
1. Determine ECG rhythm or regularity
2. Determine atrial ventricular rate.
3. Identify a P-wave morphology.
4. Measure the PR interval.
5. Measure the QRS duration, analyze the morphology.
6. Evaluate the leads in groups.
7. Identify the morphological changes.
12 lead ECG reading BIG LIE, LITTLE LIE, SAY, ALL
Big LIE
I: lateral
II: inferior
III: inferior
LITTLE LIE
aVR: not used for MI interpretation. Useful for dextrocardia and limb lead reversal.
aVL: lateral
aVF: inferior
SAY
V1: septum
V2: septum
V3: anterior
ALL
V4: anterior
V5: lateral
V6: lateral
Leads: II, III, aVF: show Ischemia, injury, & infarction where?
1. Inferior wall of left ventricle:
2. Right coronary - marginal branch:
Intercostal space (ICS)
the space between two ribs
Leads: V1 & V2: Std 12 lead Views: Ischemia, injury, & infarction:
1. Septal wall:
2. Left coronary - septal branch.
, Leads: V3 & V4: Std 12 lead Views: Ischemia, injury, & infarction:
1. Anterior wall of left ventricle.
2. Left coronary - left anterior descending branch.
Leads: I, aVL, V5 & V6: Std 12 lead Views: Ischemia, injury, & infarction:
1. Lateral wall of left ventricle.
2. Left coronary - left circumflex branch.
Anterior
Toward the front of the body; ventral
Caudal
Below, behind,directed toward or situated in or near the tail or posterior part of the body
coronal plane
divides body into front (ventral) and back (dorsal) parts. Frontal plane.
Cranial
toward the head (superior)
deep
Inward from a point of attachment, or away from the surface of the body
Distal
Farther away from a point of attachment, or from the center of the body
Dorsal
toward the back (posterior)
external
Outward or movement towards the exterior of a hollow form
frontal plane
Divides the body into front (ventral) and back (dorsal) parts; coronal plane
