ECG RAE/LAE

ECG RAE/LAE

LAE:

• • Wide >2.5 mm (100 msec) in lead II

  • P waves are biphasic in leads V1-2. If the second, negative phase of the P wave is >1.5 mm in depth, it indicates LAE.

  • In mitral valve disease: wide "double-humped" P wave >120 msec duration in lead II.

RAE:

• • P waves amplitude >2.5 or more in leads II, III

  • Peaked P wave morphology (P- pulmonale). Duration >10 msec

  • Sharply peaked biphasic P wave in lead V1 - V2 with initial deflection greater (>1.5) than the terminal deflection

Biatrial enlargement:

• • Combination of tall P waves in II, III, aVF with terminal negative V1.