Figure 031_2738. Pulmonary perfusion scintigraphy: A , normal pulmonary perfusion in a patient with pulmonary arterial hypertension secondary to systemic sclerosis; B , extensive perfusion defects in both lungs in a patient with thromboembolic pulmonary hypertension. AP, anteroposterior view; PA, posteroanterior view. Figure courtesy of Dr Adam Torbicki. - McMaster Textbook of Internal Medicine

Figure 031_2738.
Pulmonary perfusion scintigraphy: A, normal pulmonary perfusion in a patient with pulmonary arterial hypertension secondary to systemic sclerosis; B, extensive perfusion defects in both lungs in a patient with thromboembolic pulmonary hypertension. AP, anteroposterior view; PA, posteroanterior view. Figure courtesy of Dr Adam Torbicki.

Figure 031_2738. Pulmonary perfusion scintigraphy: A , normal pulmonary perfusion in a patient with pulmonary arterial hypertension secondary to systemic sclerosis; B , extensive perfusion defects in both lungs in a patient with thromboembolic pulmonary hypertension. AP, anteroposterior view; PA, posteroanterior view. Figure courtesy of Dr Adam Torbicki.