Relationship between the pressure and diameter of the carotid artery in humans

Sugawara, Motoaki; Niki, Kiyomi; Furuhata, Hiroshi; Ohnishi, Satoshi; Suzuki, Shin

doi:10.1007/pl00007261

Cited by 135 publications

(80 citation statements)

References 2 publications

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“…Many studies using dogs have demonstrated that arterial pressure waveforms and diameter-change waveforms are similar [1,30]. We reported the similarity between carotid arterial pressure waveforms measured with a catheter-tipped micromanometer and carotid arterial diameter-change waveforms measured by echo tracking in humans [34]. Thus, using systolic and diastolic pressure measured with a cuff-type manometer applied to the upper arm, we calibrated the maximum and minimum values of a diameter-change waveform and used it as a surrogate for a blood pressure waveform.…”

Section: Measurements Of Pressure Waveformsmentioning

confidence: 59%

Clinical usefulness of wave intensity analysis

Sugawara

Niki

Ohte

et al. 2008

Med Biol Eng Comput

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104

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Wave intensity (WI) is a hemodynamic index, which can evaluate the working condition of the heart interacting with the arterial system. It can be defined at any site in the circulatory system and provides a great deal of information. However, we need simultaneous measurements of blood pressure and velocity to obtain wave intensity, which has limited the clinical application of wave intensity, in spite of its potential. To expand the application of wave intensity in the clinical setting, we developed a real-time non-invasive measurement system for wave intensity based on a combined color Doppler and echo-tracking system. We measured carotid arterial WI in normal subjects and patients with various cardiovascular diseases. In the coronary artery disease group, the magnitude of the first peak of carotid arterial WI (W 1 ) increased with LV max. dP/dt (r = 0.74, P \ 0.001), and the amplitude of the second peak (W 2 ) decreased with an increase in the time constant of LV pressure decay (r = -0.77, P \ 0.001). In the dilated cardiomyopathy group, the values of W 1 were much lower than those in the normal group (P \ 0.0001). In the hypertrophic cardiomyopathy group, the values of W 2 were much smaller than those in the normal group (P \ 0.0001). In mitral regurgitation before surgery, W 2 decreased or disappeared, but after surgery W 2 appeared clearly. In the hypertension group, the magnitude of reflection from the head was considerably greater than that in the normal group (P \ 0.0001). We also evaluated hemodynamic effects of sublingual nitroglycerin in normal subjects. Nitroglycerin increased W 1 significantly (P \ 0.001). WI can be obtained non-invasively using an echo-Doppler system in the clinical setting. This method will increase the clinical usefulness of wave intensity.

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Section: Measurements Of Pressure Waveformsmentioning

confidence: 59%

Clinical usefulness of wave intensity analysis

Sugawara

Niki

Ohte

et al. 2008

Med Biol Eng Comput

Self Cite

104

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“…92 The algorithm of automated calculation is based essentially on the assumption that the observed changes of arterial diameter are linearly correlated with changes of blood pressure. 93 It is well known, however, that changes of arterial diameter follow pressure changes with a variable hysteresis, 94 and therefore this assumption could lead to an unpredictable bias. Moreover, the clinical applicability of this approach to the assessment of ventricular-arterial coupling, although promising, still needs to be demonstrated in wide populations.…”

Section: 64mentioning

confidence: 99%

Ventricular–vascular coupling in hypertension

Saba

Cameli

Casalnuovo

et al. 2014

Journal of Cardiovascular Medicine

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The present review is addressed to analyse the complex interplay between left ventricle and arterial tree in hypertension. The different methodological approaches to the analysis of ventricular-vascular coupling in the time and frequency domain are discussed. Moreover, the role of hypertension-related changes of arterial structure and function (stiffness and wave reflection) on arterial load and how ventricular-vascular coupling modulates the process of left ventricular adaptation to hypertension are analysed.The different interplay between vascular bed and left ventricle emerges as the pathophysiological basis for the development of the multiple patterns of ventricular structural adaptation in hypertension and provides a pathway for the interpretation of systolic and diastolic functional abnormalities observed in hypertensive patients. Targeting the therapeutic approach to improve ventricularvascular coupling may have relevant impact on reversing left ventricular hypertrophy and improving systolic and diastolic dysfunction. J Cardiovasc Med 2014, 15:773-787

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“…(i) using the linear relationship between percentage changes in instantaneous BP and diameter, shown for carotid artery pressure in [60];…”

Section: Blood Pressure Measurementmentioning

confidence: 99%

Ultrawideband Technology in Medicine: A Survey

Chávez-Santiago

Balasingham

Bergsland

2012

Journal of Electrical and Computer Engineering

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The utilization of wireless technology in traditional medical services provides patients with enhanced mobility. This has a positive effect on the recovery speed of a person after major surgical procedures or prolonged illness. Ultrawideband (UWB) radio signals have inherent characteristics that make them highly suitable for less invasive medical applications. This paper surveys our own and related recent research on UWB technology for medical sensing and communications. Some research perspectives in the aforementioned topics are suggested too.

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Relationship between the pressure and diameter of the carotid artery in humans

Cited by 135 publications

References 2 publications

Clinical usefulness of wave intensity analysis

Clinical usefulness of wave intensity analysis

Ventricular–vascular coupling in hypertension

Ultrawideband Technology in Medicine: A Survey

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