Non-invasive estimation of pressure at the heart is dependant on a BP cuff device measurement of BP at the arm, which differs from the invasive measurement of BP, thereby producing error in the estimation. This patent reduces the error and improves the accuracy of the non-invasive estimation of BP at the heart, which is more relevant to cardiac function and arterial properties than BP at the arm.
Blood pressure at the arm as measured by a conventional BP cuff device is different from BP measured invasively in the brachial artery at the arm. This patent is a non-invasive method to estimate the more accurate and invasively measured BP by using BP cuff waveform. It can be implemented in BP cuff devices to improve their accuracy.
Pacemakers require adjustment of the time setting based on a cardiac ejection period. This patented method uses features of an arterial pulse waveform with all features from an ECG signal to detect the correct ejection period for pacemaker timing. It provides an accurate and easy way to program pacemaker.
Non-invasively estimating heart's pressure and pressure waveform with features related to cardiac function and arterial properties by using a conventional BP cuff inflated to different pressure values. The patent provides a non-invasive, simple, and operator-independent tool that captures arterial waveform features to clinically diagnose cardiovascular system and estimate risk of having heart disease which otherwise require an invasive procedure. The method in principle can be implemented in BP cuff devices and improve their capability.