My mother, Sheila Schwartz, is a firecracker. As a lawyer, social worker, wife, mother of four and grandmother of 11, she's always on the go -- working, caring, loving life. About 10 years ago, when my mother was around 60, something suddenly changed. She began feeling tired, achy and dizzy, and her blood pressure was slightly high even though she was on blood pressure medication. Her internist tinkered with the dosage, but the blood pressure wouldn't budge.