id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-018601-mk66097y	Michelakis, Evangelos D.	Pulmonary Arterial Hypertension	2007		.txt	text/plain	26230	1416	44	18 Primary PHT was defined as mean pulmonary artery (PA) pressure >25 mm Hg at rest (or >30 mm Hg with exercise) in the absence of secondary causes for PHT, a definition different from the current definition of PAH, which includes PHT due to more common diseases like collagen vascular disease, HIV infection, portal hypertension, congenital heart disease as PAH (Table 105 .2). The following tests should be obtained in all patients in whom the cause of PHT is not evident: electrocardiogram (ECG), chest radiograph, arterial blood gases, complete blood count, electrolytes and liver function tests, pulmonary function tests (PFTs), ventilation/ perfusion lung scan, serology for rheumatic diseases (e.g., fluorescent antinuclear antibody, FANA), serology for HIV, ventilation perfusion (V/Q) scan, and an echocardiogram with Doppler assessment of PA acceleration time and tricuspid regurgitation velocity as well as an echo-contrast study, to exclude shunting.	./cache/cord-018601-mk66097y.txt	./txt/cord-018601-mk66097y.txt