Chamber Enlargment

Question 1

left atrium enlargement

Answer 1

Wide, notched P waves in lead II (P mitrale).
Biphasic P wave in V1 with a larger negative component.

Question 2

Right Atrial Enlargement (RAE):

Answer 2

Tall, peaked P waves in lead II (P pulmonale).
Biphasic P wave in V1 with a larger positive component.

Question 3

LVH

Answer 3

Deep S waves in V1 and V2.
Tall R waves in V5 and V6.
May also show left axis deviation.

Question 4

RVH

Answer 4

Tall R waves in V1.
Right axis deviation.
Often seen with signs of right-sided heart strain.