Figure 4: The total model consisting of the left ventricle (LV), with the mitral () and aortic valve (), the aorta, and the coronary circulation. The aorta and its main branches are numbered according to Table 2. The LMCA has a length of 5 mm and splits into the LAD and the LCx, with a length 7.5 cm and 6 cm, respectively. Side branches are modeled at intervals of 1.5 cm. Each coronary segment is represented by the characters a–f. The radius of segment a is 1 mm and Murray’s law is used to determine the radius of segments b–f. All a-segments are connected to the three-element model representing the coronary microvessels. The intramyocardial pressure () acts on the three capacitors that represent the vessel compliance. When a stenosis is modeled, it is incorporated into the -segment of the LAD.