Post on 20-Jun-2015
description
In Relationship to 12-Lead Electrocardiograms
Aorta
Right CoronaryArtery
Left MainArtery
LeftAnteriorDescending
CircumflexArtery
Copyright 2005Lippincott Williams &Wilkins
ST segment represents the end of ventricular conduction or depolarization and the beginning of ventricular recovery or repolarization.The point that marks the end of the QRS complex and the beginning of the ST segment is called the “J Point.”
A normal ST segment has these characteristics:
Location: extends from the S wave to the beginning of the T wave.Deflection: usually isoelectric
STsegment
J Point
• Impaired Circulation: ischemia, injury or infarction?
• Ischemia: ST depression and T-wave inversion
• Injury: ST elevation
• Infarction: ST elevation
• Q-wave: Indicates a previous infarction
Copyright 2001 American Heart Association
Copyright 2001 American Heart Association
ST Elevation in Septal Leads V1 & V2
Copyright 2001 American Heart Association
ST elevation in Anterior Leads V3 & V4
Copyright 2001 American Heart Association
Copyright 2001 American Heart Association
ST elevation in Inferior Leads II, III & aVF
Copyright 2001 American Heart Association
Copyright 2001 American Heart Association
Copyright 2001 American Heart Association
I Lateral
CircumflexArtery
aVR V1 Septal
Left AnteriorDescendingArtery
V4 Anterior
RightCoronaryArtery
II Inferior
Right CoronaryArtery
aVL Lateral
CircumflexArtery
V2 Septal
Left AnteriorDescendingArtery
V5 Lateral
CircumflexArtery
III Inferior
Right CoronaryArtery
AVF Inferior
RightCoronaryArtery
V3 Anterior
Right CoronaryArtery
V6 Lateral
CircumflexArtery
Copyright 2001 American Heart Association