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Table 1 Sample patient MRI catheterization data.

From: Provocative MRI catheterization

Patient Physiological provocation Cardiac chamber dimensions Intracardiac pressures Pulmonary vascular resistance Qp:Qs Diagnosis
A Baseline (room air) Mildly dilated left atrium Normal pulmonary artery and wedge Normal   Diastolic LV dysfunction
  10 mL/kg saline challenge 15% increase 55% increase 15% increase   
B Baseline (room air) Severely dilated right ventricle Normal Normal 2:1 Anomalous pulmonary vein
  100% O2 + 40 ppm NO   38% reduction 68% reduction   
C Baseline (room air) Severely dilated right ventricle Elevated pulmonary artery Elevated   Chronic thromboembolic pulmonary hypertension
  100% O2 + 40 ppm NO   17% reduction 25% reduction   
  1. Only salient positive and negative findings are presented for clarity.