title: Comparative evaluation of acute effects of sublingual nifedipine and oral diltiazem by echocardiographic right ventricular systolic time intervals in primary pulmonary hypertension.
mesh_terms: D000284:Administration, Oral; D000293:Adolescent; D000328:Adult; D002648:Child; D004110:Diltiazem / Q000627:therapeutic use*; D004452:Echocardiography; D005260:Female; D006352:Heart Ventricles / Q000187:drug effects; D006801:Humans; D006976:Hypertension, Pulmonary / Q000188:drug therapy*; D008297:Male; D009543:Nifedipine / Q000627:therapeutic use*; D013599:Systole / Q000187:drug effects
chemical_list: D004110:Diltiazem; D009543:Nifedipine