Heart- Left Ventricular Hypertrophy
When the heart must work harder to pump blood because of increased systemic vascular resistance, the heart's left ventricle muscular walls get thicker, such as a biceps muscle will get larger after weight training,

This is called left ventricular hypertrophy. The most common cause is high blood pressure or hypertension.
 
Other Cardiovascular Images:

Heart Anatomy
Heart Anatomy Internal
Heart- Left Ventricular Hypertrophy
Systemic Vascular Resistance
Myocardial Infarct- Heart Attack
Coronary Artery Disease

  left ventricular hypertrophy picture