Inclusion Criteria:

- Histologically or cytologically confirmed breast cancer

- Must be starting combination treatment with bevacizumab and chemotherapy. Treatment
may not have already started. Patients may receive therapy either on or off of a
clinical trial.

- Any number of prior chemotherapy or biological therapy regimens is acceptable.

- Either no history of hypertension, defined as Blood Pressure <140/90mm Hg on no
antihypertensive therapy, or medically controlled pre-existing hypertension, defined
as Blood Pressure < 140/90mm HG on one non-angiotensin converting enzyme inhibitor
(ACE-I) or non-angiotensin receptor blocking (ARB) medication.

Exclusion Criteria:

- History of uncontrolled hypertension within the previous 6 months

- Inability to assess blood pressure or have prolonged blood pressure cuff inflation
due to history of bilateral lymph node dissections, presence of an indwelling venous
access device, or other condition

- Concurrent use of a statin medication

- Systolic blood pressure < 100mm Hg