INTRAOPERATIVE CARDIAC OUTPUT DETERMINATION FROM TRANSMITRAL AND PULMONARY BLOOD FLOW MEASUREMENTS USING TRANSESOPHAGEAL PULSED DOPPLER ECHOCARDIOGRAPHY

1987 ◽  
Vol 67 (3) ◽  
pp. A639-A639 ◽  
Author(s):  
N. Roewer ◽  
F. Bednarz ◽  
A. Dziadzka ◽  
J. Schutte am Esch
Keyword(s):  
Blood Flow ◽  
Cardiac Output ◽  
Doppler Echocardiography ◽  
Pulmonary Blood Flow ◽  
Pulsed Doppler ◽  
Flow Measurements ◽  
Pulsed Doppler Echocardiography ◽  
Cardiac Output Determination ◽  
Blood Flow Measurements

scholarly journals Pulmonary Blood Flow Measurements Following Vena Cava-to-Pulmonary Artery Anastomosis

1973 ◽  
Vol 15 (2) ◽  
pp. 128-134 ◽  
Author(s):  
Francis Robicsek ◽  
Walter P. Scott ◽  
Norris B. Harbold ◽  
Harry K. Daugherty ◽  
Donald C. Mullen
Keyword(s):  
Blood Flow ◽  
Pulmonary Artery ◽  
Pulmonary Blood Flow ◽  
Vena Cava ◽  
Flow Measurements ◽  
Blood Flow Measurements

Fractal properties of pulmonary blood flow: characterization of spatial heterogeneity

1990 ◽  
Vol 69 (2) ◽  
pp. 532-545 ◽  
Author(s):  
R. W. Glenny ◽  
H. T. Robertson
Keyword(s):  
Blood Flow ◽  
Spatial Heterogeneity ◽  
Pulmonary Blood Flow ◽  
Three Dimensional ◽  
Flow Distribution ◽  
Fractal Model ◽  
Relative Dispersion ◽  
Flow Measurements ◽  
Residual Capacity ◽  
Blood Flow Measurements

The heterogeneity of pulmonary blood flow was examined using a fractal analytic procedure, and the results were compared with the traditional gravitational model of flow distribution. 99mTc-labeled macroaggregate was injected intravenously at functional residual capacity in six supine anesthetized dogs. The lungs were fixed in situ and sliced in transverse sections. The slices were imaged on a planar gamma camera, and a three-dimensional array of blood flow measurements was reconstructed for each lung. Fractal analysis was used to examine the spatial heterogeneity or RDs (relative dispersion = SD/mean) as a function of the number of pieces into which the flow array was subdivided. RDs was fractal and could be characterized by a fractal dimension (Ds) of 1.09 +/- 0.02, where a Ds of 1.0 reflects homogeneous flow and 1.5 indicates a random flow distribution. The data fit the fractal model exceptionally well with an average r = 0.98. RDs was examined in gravitational and isogravitational planes and as expected was greatest in the gravitational direction. However, the difference was small, suggesting that gravitation plays a secondary role to an underlying process producing heterogeneity. Within the limits of resolution attained by this study (piece volumes greater than 0.25 cm3), the heterogeneity of pulmonary blood flow is well characterized by a fractal model.

Limits of reproducibility of blood flow measurements by doppler echocardiography

1987 ◽  
Vol 59 (1) ◽  
pp. 133-137 ◽  
Author(s):  
Erik J. Meijboom ◽  
Hans Rijsterborgh ◽  
Hans Bot ◽  
Job A.J. De Boo ◽  
Jos R.T.C. Roelandt ◽  
...  
Keyword(s):  
Blood Flow ◽  
Doppler Echocardiography ◽  
Flow Measurements ◽  
Blood Flow Measurements

Assessment of coronary blood flow by transesophageal two-dimensional pulsed Doppler echocardiography

1988 ◽  
Vol 62 (9) ◽  
pp. 641-644 ◽  
Author(s):  
Masakazu Yamagishi ◽  
Kunio Miyatake ◽  
Shintaro Beppu ◽  
Keiji Kumon ◽  
Shin Suzuki ◽  
...  
Keyword(s):  
Blood Flow ◽  
Coronary Blood Flow ◽  
Doppler Echocardiography ◽  
Two Dimensional ◽  
Pulsed Doppler ◽  
Pulsed Doppler Echocardiography

Cardiovascular Changes in Preterm Infants Nursed Under Radiant Warmers

PEDIATRICS ◽  
1987 ◽  
Vol 80 (2) ◽  
pp. 235-239
Author(s):  
Frans J. Walther ◽  
Paul Y.K. Wu ◽  
Bijan Siassi
Keyword(s):  
Heart Rate ◽  
Blood Flow ◽  
Cardiac Output ◽  
Oxygen Consumption ◽  
Newborn Infants ◽  
Cardiovascular Effects ◽  
Radiant Heat ◽  
Flow Measurements ◽  
Blood Flow Measurements ◽  
Radiant Warmer

Radiant heat is known to increase insensible water loss and, to a certain extent, oxygen consumption. Little is known about its cardiovascular effects. We measured cardiac output, stroke volume, heart rate, and lower limb and skin blood flow in 20 preterm newborn infants nursed in an incubator and under a radiant warmer at an abdominal skin temperature of 36.5°C. Mean (±SEM) birth weight was 1.57 (0.06) kg, gestational age 31.7 (0.4) weeks, and weight at examination 1.69 (0.02) kg; median postnatal age was 15 days. Skin and limb blood flow measurements increased by 44% to 55% with radiant heat (P < .001 and P < .01, respectively). Cardiac output increased by 5.4% (P < .02) under the radiant warmer secondary to a small but significant (P < .05) increase in heart rate. The changes in cardiac output during radiant heat administration are comparable to those reported for oxygen consumption.

Sign in / Sign up

Export Citation Format

Share Document