One model shows normal heart anatomy. A myocardial infarction model demonstrates a partially healed heart and five discolored infarct areas, including a thrombus in the apex of the heart. The third model illustrates a heart with congestive heart failure as a result of hypertension. This model shows left ventricle hypertrophy and the enlarged and distorted shape of the heart is shown both internally and externally. Normal and myocardial infarction models measure 4" x 2-1/4" x 1-3/4"; congestive heart failure model is 4" x 2-1/2" x 2-1/4". The 8-3/4" x 6-1/4" base holds a 6-1/2" x 5-1/4" key card.