It is a measurement of blood pressure at predefined regular interval up to 24 hours. This test would be helpful. To record the variations in blood pressure at pre-defined times of the day. To decide the right dose of medicine and to determine the efficiency of medicines. To detect acclerated hypertension in the morning, which may cause stroke in the near future. Helpful in clinical situations such as borderline hypertension, apparent drug resistance, episodic hypertension & "white coat" syndrome. To evaluate hypotensive symptoms from medications or autonomic dysfunction.