ASYMMETRIC HYPERTROPHY OF THE

INTERVENTRICULAR SEPTUM

• This usually occurs in cases of chronic volume overload, as the ventricle responds by adding new sarcomeres in-series with existing ones.
• Often seen in fetuses of diabetic mothers.
• Wall thickness increases in proportion to an increase in chamber size.

CONCENTRIC HYPERTROPHY OF THE

INTERVENTRICULAR SEPTUM

• This usually occurs in chronic pressure overload. Wall thickness increases as sarcomeres are added in-parallel to existing ones.
• The interventricular septum and posterior heart wall is thickened.
• Cardiac chamber size may or may not be reduced.