Myelodysplastic and myeloproliferative Disease represent conditions with increased risk for
pulmonary hypertension. However, the exact prevalence of pulmonary hypertension in these
conditions is not known. The effects of pulmonary hypertension on the clinical picture and
the symptoms of patients in these conditions needs also further exploration. This exploratory
study is designed to describe the prevalence of pulmonary hypertension in the population with
such hematologic diseases, and the stages of pulmonary hypertension as well its effect on
exercise capacity at time of diagnosis.