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. 2005 Aug;91(8):1064–1069. doi: 10.1136/hrt.2004.038265

Table 2.

 Patient characteristics and haemodynamic data measured during MRI

Control group Primary PHT Secondary PHT
Patient characteristics
    Heart rate (beats/min)
        MRI laboratory 65 (11) 73 (9) 82 (8)
        Catheterisation laboratory 63 (9) 72 (10) 82 (9)
    Mean systemic arterial pressure (mm Hg)
        MRI laboratory 73 (8) 71 (7) 68 (9)
        Catheterisation laboratory 74 (9) 71 (12) 69 (8)
Haemodynamic data
    Mean PA pressure (mm Hg)
        MRI laboratory 12.3 (3.1) 57.4 (21.4)* 43.5 (16.3)*
        Catheterisation laboratory 12.6 (3.2) 57.1 (10.2)* 43.7 (17.8)*
    Measures during MRI
        PA flow volume (l/min/m2) 3.1 (0.3) 2.2 (0.6)* 3.7 (0.9)* †
        Baseline PVR (Wood units·m2) 1.2 (0.8) 17.2 (4.5)* 8.9 (3.9)* †

*p<0.01, control versus pulmonary hypertension (PHT) group; †p<0.01 secondary versus primary PHT.

PVR, pulmonary vascular resistance.