When the heart is working for a prolonged time against increased pressure, it becomes more muscular and this increased muscularity is referred to as hypertrophy. As the left ventricle is responsible for pumping blood around the body, any pathology within the body which makes it more difficult to pump blood around may over a period of time, lead to left ventricular hypertrophy. A hypertrophied heart weighs a lot more than a nonhypertrophied heart.

Left ventricular hypertrophy is important for 2 main reasons:
It is a sign that the heart is under stress and therefore whenever we see it, we must try and identify the stressor

The left ventricular hypertrophy itself can cause us harm.