Rosito, G A Effect of sustained-release Verapamil on the morning systemic arterial pressure surge during daily activity in patients with systemic hypertension. [electronic resource] - The American journal of cardiology May 1997 - 1252-5 p. digital Publication Type: Clinical Trial; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't ISSN: 0002-9149 Standard No.: 10.1016/s0002-9149(97)00093-3 doi Subjects--Topical Terms: AdultAnalysis of VarianceBlood Pressure--drug effectsCircadian Rhythm--drug effectsDelayed-Action PreparationsDouble-Blind MethodDrug Administration ScheduleFemaleFourier AnalysisHeart Rate--drug effectsHumansHypertension--drug therapyMaleMiddle AgedMonitoring, PhysiologicVerapamil--administration & dosage