Coronary heart disease electrocardiogram

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Overview

Stress testing is used for risk stratification and diagnosis of coronary artery disease.

Electrocardiogram

Exercise EKG is preferred initial test unless the patients have uninterpretable EKG not in a condition to exercise. Few uninterpretable EKG conditions are

• WPW syndrome
• > 1 mm of ST depression at rest
• Left bundle branch block
• Ventricular pacing
• Resting abnormalities of ST segment and T waves

Prognostic Markers: Exercise EKG

• In ECG recording
  • Maximum ST elevation
  • Number of leads showing changes
  • Duration for onset of ST segment changes
  • Duration for ST segment change recovery
  • ST/HR indices
  • Occurrence exercise induced ventricular arrhythmia