Figure 1From: Reduced right and left ventricular myocardial perfusion reserve in patients with scleroderma-associated and idiopathic (IPAH) pulmonary arterial hypertension due to impaired microvascular vasoreactivityA, B: Myocardial blood flow (MBF) images in a non-PAH patient (58 year-old female, mPAP 12 mmHg) demonstrate a marked increase from rest (A) to adenosine-induced stress (B) conditions. C, D: In a patient with scleroderma-association PAH (67 year-old female, MPAP 20 mmHg), there is only a mild increase in biventricular MBF from rest (C) to stress (D).Back to article page