Wrist pulse analysis for identification of health status is found in Ancient Indian as well as Chinese literature. The preprocessing of wrist pulse is necessary to remove outlier pulses and fluctuations prior to the analysis of pulse pressure signal. This paper discusses the identification of irregular pulses present in the pulse series and intricacies associated with the extraction of time dom...

In this study a semi-automated image-processing based method was designed in which the parameters such as intima-media thickness (IMT), resistive index (RI), pulsatility index (PI), dicrotic notch index (DNI), and mean wavelet entropy (MWE) were evaluated in B-mode and Doppler ultrasound in patients presenting with carotid artery atherosclerosis. In a cross-sectional design, 144 men were divide...

This study was undertaken to determine 1) whether a combined radionuclide-hemodynamic technique could define the right ventricular end-systolic pressure-volume relation (RV ESPVR) in the clinical setting, 2) whether the human RV ESPVR defined by maximal elastance is linear and responsive to inotropic interventions, and 3) whether more easily measured modifications of the ESPVR are reliable subs...

This paper describes a novel approach designed for non-invasive, routine screening of patients cardiovascular disorders without the complexities using an electrocardiogram or invasive probes. Specifically, oscillographic-view brachial artery blood pressure waveform, including dicrotic notch, is extracted from information in pulsations ordinary cuff. The novelty this that total continuous shape ...

THE SIGNS of ventricular septal defect depend on the size of the defect and the pulmonary vascular resistance, these factors determining the direction and degree of the shunt and producing the well-known variations in the characteristics of the systolic murmur. Abnormally wide splitting of the second heart sound is a feature of ventricular septal defect with left-to-right shunt which seems to h...

SUMMARY To test the hypothesis that the fall in supravalvular aortic diastolic pressure is relative to the severity of the regurgitant flow in aortic regurgitation, 27 patients with isolated aortic regurgitation, 23 patients with combined aortic regurgitation and stenosis, and 15 normal subjects were studied. Diastolic pulse pressure (pressure at the dicrotic notch minus pressure at end diastol...

With the technical assistance of William Urban Previous studies have shown abnormalities of the arterial pulse wave in hypertensive subjects of all age groups. The major change has been diminution to disappearance of the dicrotic wave. The pharmacologic differences between epinephrine and norepi-nephrine offer a means of studying the mechanism of this change in the dicrotic wave. In the present...

The ocular pulse SIR,-The important editorial on the ocular pulse,' highlights the observations of the retinal arterial pulsations noted by early ophthalmologists. It was Thiel' who first attempted to quantify the recording of the transmitted pulsations which had become known as the tonometric sign as early as 1879. Priestley Smith' had clearly described the spontaneous vascular pulsations obse...

To evaluate the temporal relationship between blood flow, blood pressure, and muscle contractions, we continuously measured femoral arterial inflow with ultrasound Doppler at onset of passive exercise and voluntary, one-legged, dynamic knee-extensor exercise in humans. Blood velocity and inflow increased ( P < 0.006) with the first relaxation of passive and voluntary exercise, whereas the arter...