![]() Poiseuille’s law has also been used to model PVR (Figure 2). ![]() Pulmonary vascular resistance can also be represented in units of dynes/sec/cm5 (normal = 37-250 dynes/sec/cm5). A normal value for pulmonary vascular resistance using conventional units is 0.25–1.6 mmHg Total blood flow represents the cardiac output (5 to 6 L/min). The output pressure represents the pulmonary venous pressure, which is also equivalent to the pulmonary capillary wedge pressure or left atrial pressure (5 to 6 mmHg). ![]() It is most commonly modeled using a modification of Ohm’s law (figure 1).Īs seen in figure 1, input pressure represents the mean pulmonary arterial pressure (15 mmHg). Pulmonary vascular resistance is the resistance against blood flow from the pulmonary artery to the left atrium. ![]()
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