A blood pressure measurement system comprising; a cuff or a chamber which is attachable to apparatus selectively able to pressurise said cuff or chamber; at least one pressure sensor in fluid communication with the cuff or chamber, said sensor able to sense cuff or chamber pressure and variances therein at least above 20Hz; at least one pressure sensor in fluid communication with the cuff or chamber, said sensor able to sense cuff or chamber pressure and variances therein at least equal to or below 2Hz; and means to analyse the sensed pressure and variances, wherein said means is configured to: - analyse the pressure and variances therein at least above 20Hz to identify micro-pulses, wherein the micro-pulses comprise very low amplitude fast negative pressure deflections superimposed on a rising pressure component of an oscillometric waveform, and wherein the micro-pulses are associated with opening and closing of an artery and only exist between systolic blood pressure and diastolic blood pressure; - analyse the pressure and variances therein at least equal to or below 2Hz to determine a baseline cuff or chamber pressure; and - determine systolic blood pressure and diastolic blood pressure from the baseline cuff or chamber pressure in conjunction with the micro-pulses. a cuff or a chamber which is attachable to apparatus selectively able to pressurise said cuff or chamber; at least one pressure sensor in fluid communication with the cuff or chamber, said sensor able to sense cuff or chamber pressure and variances therein at least above 20Hz; at least one pressure sensor in fluid communication with the cuff or chamber, said sensor able to sense cuff or chamber pressure and variances therein at least equal to or below 2Hz; and means to analyse the sensed pressure and variances, wherein said means is configured to: - analyse the pressure and variances therein at least above 20Hz to identify micro-pulses, wherein the micro-pulses comprise very low amplitude fast negative pressure deflections superimposed on a rising pressure component of an oscillometric waveform, and wherein the micro-pulses are associated with opening and closing of an artery and only exist between systolic blood pressure and diastolic blood pressure; - analyse the pressure and variances therein at least equal to or below 2Hz to determine a baseline cuff or chamber pressure; and - determine systolic blood pressure and diastolic blood pressure from the baseline cuff or chamber pressure in conjunction with the micro-pulses. - analyse the pressure and variances therein at least above 20Hz to identify micro-pulses, wherein the micro-pulses comprise very low amplitude fast negative pressure deflections superimposed on a rising pressure component of an oscillometric waveform, and wherein the micro-pulses are associated with opening and closing of an artery and only exist between systolic blood pressure and diastolic blood pressure; - analyse the pressure and variances therein at least equal to or below 2Hz to determine a baseline cuff or chamber pressure; and - determine systolic blood pressure and diastolic blood pressure from the baseline cuff or chamber pressure in conjunction with the micro-pulses.