Pulmonary transit time (PTT) derived from routine cardiac magnetic resonance perfusion scans is a robust and easily obtainable noninvasive parameter of hemodynamics. PTT correlates with both LVEF, RVEF and NT-proBNP and could serve as a new global non-invasive parameter with a discriminative character for detecting cardiopulmonary dysfunction. We demonstrate that PTT has a high diagnostic accuracy in terms of exclusion and inclusion of heart failure as assessed by NT-proBNP, even in patients with preserved LVEF and RVEF.
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