Atrial Abnormality

Updated October 23, 2019

Right Atrial Abnormality

Causes

• Congenital
• Valvular Heart Disease
• Cor pulmonale

Criteria

• P wave > 2.5mm in height (Lead II)
• Positive first part of P-wave in V1 > 1.5mm
• P-wave Axis:
  • Rightward: P pulmonale
  • Leftward: P congenitale

Examples

Left Atrial Abnormality

Causes

• Mitral Stenosis
• Mitral Regurgitation
• Hypertension
• Ischemic Heart Disease

Criteria

• Negative part of P-wave in V1 duration (ms) x depth (mm) larger than 40ms
• P-wave Duration ≥ 120ms (leads I, II, III) + negativity in V1 > 40ms
• P-wave Duration >120ms, and widely notched P-wave (>40ms)

Examples