Foot and Ankle International
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Wheeless' Textbook of Orthopaedics

ST segment: Discussion


- See: EKG Dx of MI * Usually short: < 2mm flat; * Isoeletric w/ PR segment: (not T-P segment); * Duration: < 2 mm; See QT widening; * Axis: Anterion (J point Elevation: V1-V3); - Considered Early Repolarization; * ST ELEVATION: - ST above PR segment in Inferior, Anterior, &/or Lateral Leads; - If normal variant, call it "J point elevation; - V2: ST Elevation: ? Acute Ischemic Injury; - See MI EKG Patterns / Rx of MI * ST depression: - ST below PR segment in Inferior, Anterior, &/or Lateral Leads; - II: ST Depression: Abnormal in Lead II; - Scooped Out: Digitoxin; (See EKG Changes) * - V5: Inverted T wave / Increased R wave: ? LVH: - See EKG Changes from MI ;



Original Text by Clifford R. Wheeless, III, MD.