Tissue Sodium in Pre-hypertensive Patients

Inclusion Criteria:

- Age 30 to 80 years old;

- Systolic blood pressures between 110 to 150 mmHg and/or diastolic blood pressure
between 80-99 mmHg;

- Ability to give informed consent.

Exclusion Criteria:

- Pregnancy;

- Intolerance to study protocols;

- Acute cardiovascular events within the previous 6 months;

- Impaired renal function [estimated glomerular filtration rate (GFR) < 45
ml/min/1.73m^2];

- Current or recent treatment with systemic glucocorticoid therapy (within 1 month of
enrollment);

- Current use of anti-hypertensive medication (except calcium channel blockers and beta
blockers);

- Diabetes mellitus requiring medical therapy;

- Morbid obesity (BMI > 45);

- Prior adverse reaction to a thiazide or spironolactone;

- Claustrophobia preventing the patient from having an MRI or other contraindications to
MRI;

- Impaired hepatic function (aspartate amino transaminase and/or alanine amino
transaminase > 1.5x upper limit of normal range);

- Current illicit drug use;

- Sexually active women of childbearing potential** who are unwilling to practice
adequate contraception during the study [adequate contraceptive measures include
stable use of oral contraceptives or other prescription pharmaceutical contraceptives
for 2 or more menstrual cycles prior to screening; intrauterine device (IUD);
bilateral tubal ligation; vasectomy; condom plus contraceptive sponge, foam, or jelly,
or diaphragm plus contraceptive sponge, foam, or jelly].

- Postmenopausal women must be amenorrheic for at least 12 months in order not to
be considered of child bearing potential. Pregnancy testing and contraception are
not required for women with documented hysterectomy or tubal ligation.