For a patient case study assignment: 55 y/o male, with HTN, who takes diuretic furosemide, Beta blocker Metoprolol, and vasodilator Minoxidil, suffered a stable R pelvic fracture (internal fixation not required), on bedrest for 2 days, and can now start aquatic therapy to allow gradual increase in wt. bearing. Pool temperature kept at 95*F. Heart rate & blood pressure monitored at frequent intervals while in the pool, with hypotension occurring when pt. exited the pool. 1) why is hypotension occurring? 2) how can hypotensive episodes after aquatic treatment be prevented?