Comparison of plethysmographic methods with pulsed Doppler blood flowmetry

Levy, B. I.; Valladares, W.; Ghaem, A; Martineaud, J.P.

doi:10.1152/ajpheart.1979.236.6.h899

Cited by 24 publications

(25 citation statements)

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“…The strong relationship between VOP and DU blood flow measurements in the present study is in line with previous studies reporting correlation coefficients varying from 0.57 to 0.99 at rest and during exercise [14, 16, 27]. Head-up tilt affects muscle blood flow more than skin blood flow [21, 28].…”

Section: Discussionsupporting

confidence: 92%

Leg blood flow measurements using venous occlusion plethysmography during head-up tilt

et al. 2007

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Section: Discussionsupporting

confidence: 92%

Leg blood flow measurements using venous occlusion plethysmography during head-up tilt

et al. 2007

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“…Forearm blood flow was measured with a mercury in sylastic strain-gauge plethysmograph using a venous occlusion technique as previously described (27). The strain gauge was placed -5 cm below the antecubital crease.…”

Section: Methodsmentioning

confidence: 99%

Failure of atrial natriuretic factor to increase with saline load in patients with dilated cardiomyopathy and mild heart failure.

Volpe¹,

Tritto²,

Luca³

et al. 1991

J. Clin. Invest.

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To investigate whether the response of atrial natriuretic factor (ANF) to volume expansion is impaired in the early stages of dilated cardiomyopathy, the effects of saline load (SL; 0.25 ml/kg. min for 120 min) were assessed in 12 patients with dilated cardiomyopathy and asymptomatic to mildly symptomatic heart failure (HF) and in nine normal subjects (N). SL increased plasma ANF levels in N (from 143±2 to 19.5±3 and 26±4 pg/ml, at 60 and 120 min, respectively, P < 0.001), but not in HF (from 42.9±9 to 45.9±9 and 43.9±8 pg/ml). Left ventricular end-diastolic volume (LVEDV) and stroke volume were increased (P < 0.001) by SL in N but not in HF. Urinary sodium excretion (UNSY) increased in N more than in HF during SL, whereas forearm vascular resistance (FVR) did noi change in N and increased in HF (P < 0.001). In five HF patients SL was performed during ANF infusion (50 ng/kg, 5 ng/kg min) that increased ANF levels from 37.1±10 to 146±22 pg/ml. In this group, SL raised both LVEDV (P < 0.01) and ANF (P < 0.05), whereas FVR did not rise. In addition, the UN.V increase and renin and aldosterone suppressions by SL were more marked than those observed in HF under control conditions. Thus, in patients with dilated cardiomyopathy and mild cardiac dysfunction, plasma ANF levels are not increased by volume expansion as observed in N. The lack of ANF response is related to the impaired cardiac adaptations. The absence ofan adequate increase ofANF levels may contribute to the abnormal responses of HF patients to saline load. (J.

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“…The adjustable rangegated time system of reception enables one, by means of an electronic gate, to compute both the time delay and the duration of the received signal -i.e. the depth and the width of the measurement volume of Doppler signals: 12 this permits one to determine the arterial diameter (D) and to sample cross-sectional velocity (V) of an artery as follows: the arterial diameter is deduced from a peak to peak velocity profile ( 2) the arterial diameter is calculated as : D = 0.4 mm x N x Sin. 60°, 60°b eing the ultrasound beam incidence angle with the vessel axis; the accuracy of such pulsed Doppler arterial diameter measurements was tested previously in vitro with calibrated latex tubes; this accuracy is again confirmed in this study by the existence of significant correlation between the common carotid artery diameter measured by arteriography and that calculated by the pulsed Doppler methods in all the patients (r = 0.77; p < 0.001).…”

Section: Description Of the Pulsed Doppler Systemmentioning

confidence: 99%

Pulsed Doppler: an evaluation of diameter, blood velocity and blood flow of the common carotid artery in patients with isolated unilateral stenosis of the internal carotid artery.

Bénétos¹,

Simón²,

Levenson³

et al. 1985

Stroke

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SUMMARY Arterial diameter, blood velocity and blood flow of both common carotid arteries were studied in 24 patients with isolated unilateral internal carotid artery stenosis, without any other significant lesion of the carotid system. The methodology used a pulsed Doppler system with two original characteristics: an adjustable range-gated system and a double transducer probe enabling both the arterial diameter and blood velocity to be evaluated. On the involved side, the diameter, the blood velocity and the blood flow were significantly reduced (p < 0.001) in comparison with the opposite side. The degree of the internal carotid artery stenosis judged on arteriography was negatively correlated with (i) the blood flow of the common carotid artery homolateral to the stenosis (r = -0.78, p < 0.001), and (ii) the ratio of the common carotid artery blood flow between the involved and the opposite side (r = -0.80, p < 0.001). The proposed quantitative evaluation can be suitable for the detection and for the follow up of patients with stenosis of the internal carotid artery who do not have any other lesion of the carotid system.

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Comparison of plethysmographic methods with pulsed Doppler blood flowmetry

Cited by 24 publications

References 0 publications

Leg blood flow measurements using venous occlusion plethysmography during head-up tilt

Leg blood flow measurements using venous occlusion plethysmography during head-up tilt

Failure of atrial natriuretic factor to increase with saline load in patients with dilated cardiomyopathy and mild heart failure.

Pulsed Doppler: an evaluation of diameter, blood velocity and blood flow of the common carotid artery in patients with isolated unilateral stenosis of the internal carotid artery.

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