title: Pulmonary artery pressure and pulmonary vascular resistance before and after mitral balloon valvotomy in 100 patients with severe mitral valve stenosis.
abstract: We studied the pulmonary vascular hemodynamics before and after mitral balloon valvotomy in 100 patients with severe mitral valve stenosis. Before balloon valvotomy 23 patients had a pulmonary artery systolic pressure of < 31 mm Hg (group 1), 54 patients had a pulmonary artery systolic pressure between 31 and 50 mm Hg (group 2), and 23 patients had a pulmonary artery systolic pressure of > 50 mm Hg (group 3). After balloon valvotomy the mean systolic pulmonary artery pressure in group 1 decreased from 28 +/- 3 to 26 +/- 5 mm Hg (p = NS). In group 2 the systolic pulmonary artery pressure after balloon valvotomy decreased from 41 +/- 5 to 33 +/- 7 mm Hg (p < 0.0001) and normalized to < 31mm Hg in 27 patients (50%). The mean left atrial pressure was abnormal (> or = 13 mm Hg) in 6 of 27 patients (22%) who had a systolic pulmonary artery systolic pressure of < 31 mm Hg and in 6 of 27 patients (22%) with a pulmonary artery systolic pressure of > or = 31 mm Hg. The pulmonary vascular resistance was abnormal in 36 of 54 patients (67%) after mitral balloon valvotomy; only 5 of 36 patients (14%) had a raised left atrial pressure (> or = 13 mm Hg). In group 3 the pulmonary vascular resistance was abnormal (> 125 dynes/sec/cm-5) in all 23 patients before and in 19 of 31 patients (91%) after balloon valvotomy.(ABSTRACT TRUNCATED AT 250 WORDS)
authors: Department of Cardiology, Loma Linda University Medical Center, CA 92354.
authors: P A
authors: PA
authors: Ribeiro
authors: M
authors: M
authors: al Zaibag
authors: M
authors: M
authors: Abdullah
mesh_terms: D000328:Adult; D001794:Blood Pressure; D002404:Catheterization; D005260:Female; D006801:Humans; D006976:Hypertension, Pulmonary / Q000209:etiology / Q000503:physiopathology; D008297:Male; D008946:Mitral Valve Stenosis / Q000150:complications / Q000503:physiopathology* / Q000628:therapy; D011184:Postoperative Period; D011651:Pulmonary Artery / Q000503:physiopathology*; D014655:Vascular Resistance