Some embodiments of the invention relate to a method of treating pulmonary hypertension comprising: introducing a catheter device comprising one or more energy emitting transceivers into the pulmonary artery lumen； positioning the one or more transceivers within the left, right and/or main pulmonary artery at a location which is in between the first bifurcation of the left pulmonary artery and the first bifurcation of the right pulmonary artery； and thermally damaging nerve tissue by emitting energy having parameters selected to damage nerves only within a distance window of between 0.2 mm and 20 mm from the intimal aspect of the pulmonary artery wall when the one or more transceivers are positioned at the selected location.
