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Dear Elizabeth
Pulmonary hypertension can be serious, as you write. A pulmonary pressure of 37 depends on whether you are referring to a mean pressure or a systolic pressure. If it is a systolic pressure, that is not too bad. If it is a mean pressure reported, then it is a little more serious. Clots in the lung can cause this - your ventilation scan should answer this question. Other lung diseases can also lead to secondary pulmonary hypertension. If you smoke, you should stop.
I hope this has been useful. I wish you the best of luck. Feel free to write back.
If you would like to make an appointment at the Cleveland Clinic Heart Center, please call 1-800-CCF-CARE or inquire online by using the Heart Center website at www.ccf.org/heartcenter. The Heart Center website contains a directory of the cardiology staff that can be used to select the physician best suited to address your cardiac problem.