The apparatus and methods of the present invention provide a non-invasive
measurement of blood pressure with a frequency that approximates a
continuous measurement. Blood pressure measurement provides information
that is both clinically and diagnostically significant. In accordance
with an aspect of the present invention, a method for providing a
non-invasive measurement of blood pressure, includes obtaining a first
input signal and a second input signal indicative of systolic blood
pressure and diastolic blood pressure, respectively; tracking a signal
indicative of pulse pressure; continuously measuring a third signal
indicative of mean blood pressure; and processing the signals to obtain a
measurement indicative of systolic and diastolic blood pressure, wherein
at least a portion of the measurement indicative of systolic and
diastolic blood pressure is continuous. The second input signal
indicative of diastolic blood pressure is analyzed to identify a maximum
amplitude of the signal, the maximum amplitude being indicative of the
diastolic blood pressure measurement.